Flora and fauna of the Outer Hebrides
Encyclopedia
The flora
Flora
Flora is the plant life occurring in a particular region or time, generally the naturally occurring or indigenous—native plant life. The corresponding term for animals is fauna.-Etymology:...

 and fauna
Fauna
Fauna or faunæ is all of the animal life of any particular region or time. The corresponding term for plants is flora.Zoologists and paleontologists use fauna to refer to a typical collection of animals found in a specific time or place, e.g. the "Sonoran Desert fauna" or the "Burgess shale fauna"...

 of the Outer Hebrides
Outer Hebrides
The Outer Hebrides also known as the Western Isles and the Long Island, is an island chain off the west coast of Scotland. The islands are geographically contiguous with Comhairle nan Eilean Siar, one of the 32 unitary council areas of Scotland...

in north west Scotland
Scotland
Scotland is a country that is part of the United Kingdom. Occupying the northern third of the island of Great Britain, it shares a border with England to the south and is bounded by the North Sea to the east, the Atlantic Ocean to the north and west, and the North Channel and Irish Sea to the...

 comprises a unique and diverse ecosystem
Ecosystem
An ecosystem is a biological environment consisting of all the organisms living in a particular area, as well as all the nonliving , physical components of the environment with which the organisms interact, such as air, soil, water and sunlight....

. A long archipelago, set on the eastern shores of the Atlantic Ocean
Atlantic Ocean
The Atlantic Ocean is the second-largest of the world's oceanic divisions. With a total area of about , it covers approximately 20% of the Earth's surface and about 26% of its water surface area...

, it attracts a wide variety of sea birds, and thanks to the Gulf Stream
Gulf Stream
The Gulf Stream, together with its northern extension towards Europe, the North Atlantic Drift, is a powerful, warm, and swift Atlantic ocean current that originates at the tip of Florida, and follows the eastern coastlines of the United States and Newfoundland before crossing the Atlantic Ocean...

 a climate more mild than might be expected at this latitude. Because it is on the Gulf Stream, it also occasionally gets exotic visitors.

Birds

Three hundred and twenty seven species of birds have been recorded in the Western Isles and more than 100 breed. The Islands provide a natural flyway for migrating landbirds to and from their Arctic breeding grounds and a refuge for windblown vagrants from America and northern Europe. Many species of bird breed in the Western Isles and the surrounding islands, including, most of Britain's corncrakes which breed on the croftlands of all the islands.

Many species of seabird
Seabird
Seabirds are birds that have adapted to life within the marine environment. While seabirds vary greatly in lifestyle, behaviour and physiology, they often exhibit striking convergent evolution, as the same environmental problems and feeding niches have resulted in similar adaptations...

s inhabit the coastal areas of the islands, such as shag, gannet
Gannet
Gannets are seabirds comprising the genus Morus, in the family Sulidae, closely related to the boobies.The gannets are large black and white birds with yellow heads. They have long pointed wings and long bills. Northern gannets are the largest seabirds in the North Atlantic, with a wingspan of up...

s, fulmar
Fulmar
Fulmars are seabirds of the family Procellariidae. The family consists of two extant species and two that are extinct.-Taxonomy:As members of Procellaridae and then the order Procellariiformes, they share certain traits. First, they have nasal passages that attach to the upper bill called...

s, kittiwakes
Black-legged Kittiwake
The Black-legged Kittiwake is a seabird species in the gull family Laridae.This species was first described by Linnaeus in his Systema naturae in 1758 as Larus tridactylus....

, guillemot
Guillemot
Guillemots is the common name for several species of seabird in the auk family . In British use, the term comprises two genera: Uria and Cepphus. In North America the Uria species are called "murres" and only the Cepphus species are called "guillemots"...

s and the ubiquitous seagulls.

In the Uig
Uig, Lewis
Uig , also known as Sgìr' Ùig, is a civil parish and community on the western coast of the island of Lewis in the Outer Hebrides, Scotland. It consists of scattered settlements around the bay of Camas Uig and the Bhaltos peninsula...

 hills in Lewis, it is possible to spot golden eagle
Golden Eagle
The Golden Eagle is one of the best known birds of prey in the Northern Hemisphere. Like all eagles, it belongs to the family Accipitridae. Once widespread across the Holarctic, it has disappeared from many of the more heavily populated areas...

s; it has also been claimed that white-tailed eagle
White-tailed Eagle
The White-tailed Eagle , also known as the Sea Eagle, Erne , or White-tailed Sea-eagle, is a large bird of prey in the family Accipitridae which includes other raptors such as hawks, kites, and harriers...

s have been seen in the area. In the Pairc area, it is possible to see feeding oyster catchers and curlew
Curlew
The curlews , genus Numenius, are a group of eight species of birds, characterised by long, slender, downcurved bills and mottled brown plumage. They are one of the most ancient lineages of scolopacid waders, together with the godwits which look similar but have straight bills...

s.

A few pairs of peregrine falcon
Peregrine Falcon
The Peregrine Falcon , also known as the Peregrine, and historically as the Duck Hawk in North America, is a widespread bird of prey in the family Falconidae. A large, crow-sized falcon, it has a blue-gray back, barred white underparts, and a black head and "moustache"...

s survive on coastal cliffs and merlin
Merlin
Merlin is a legendary figure best known as the wizard featured in the Arthurian legend. The standard depiction of the character first appears in Geoffrey of Monmouth's Historia Regum Britanniae, written c. 1136, and is based on an amalgamation of previous historical and legendary figures...

 and buzzard
Buzzard
A buzzard is one of several large birds, but there are a number of meanings as detailed below.-Old World:In the Old World Buzzard can mean:* One of several medium-sized, wide-ranging raptors with a robust body and broad wings....

 are not uncommon anywhere on hill and moor. red-throated diver
Red-throated Diver
The Red-throated Loon or Red-throated Diver is a migratory aquatic bird found in the northern hemisphere. It breeds primarily in Arctic regions, and winters in northern coastal waters. It is the most widely distributed member of the loon or diver family. Ranging from in length, the Red-throated...

s nest on countless small tarn
Tarn (lake)
A tarn is a mountain lake or pool, formed in a cirque excavated by a glacier. A moraine may form a natural dam below a tarn. A corrie may be called a cirque.The word is derived from the Old Norse word tjörn meaning pond...

s and a very few black-throated diver
Black-throated Diver
The Black-throated Loon is a migratory aquatic bird found in the northern hemisphere. The species is known as an Arctic Loon in North America and the Black-throated Diver in Eurasia, its current name is a compromise proposed by the International Ornithological Committee.-Taxonomy:The...

s on bigger lochs. Arctic skua
Arctic Skua
The Parasitic Jaeger, also known as the Arctic Skua or Parasitic Skua, is a seabird in the skua family Stercorariidae....

s are spreading south from Lewis as far as South Uist but the great skua
Great Skua
The Great Skua, Stercorarius skua, is a large seabird in the skua family Stercorariidae. In Britain, it is sometimes known by the name Bonxie, a Shetland name of unknown origin.-Description:...

 is still found breeding only in Lewis, St Kilda, North Rona, the Shiant Isles and Barra Head.

An important feature of the winter bird life is the great diversity of wildfowl. A variety of duck
Duck
Duck is the common name for a large number of species in the Anatidae family of birds, which also includes swans and geese. The ducks are divided among several subfamilies in the Anatidae family; they do not represent a monophyletic group but a form taxon, since swans and geese are not considered...

, such as eider
Eider
Eiders are large seaducks in the genus Somateria. Steller's Eider, despite its name, is in a different genus.The three extant species all breed in the cooler latitudes of the Northern hemisphere....

 and long-tailed are found in the shallow water around Lewis.

Great Bernera
Great Bernera
Great Bernera , often known just as Bernera is an island and community in the Outer Hebrides of Scotland. With an area of just over , it is the thirty-fourth largest Scottish island....

 hosts numerous sea bird species, including gulls, waders and ducks such as Goldeneye
GoldenEye
GoldenEye is the seventeenth spy film in the James Bond series, and the first to star Pierce Brosnan as the fictional MI6 agent James Bond. The film was directed by Martin Campbell and is the first film in the series not to take story elements from the works of novelist Ian Fleming...

. More unusually, a Jack Snipe
Jack Snipe
The Jack Snipe, Lymnocryptes minimus is a small stocky wader. It is the smallest snipe, and the only member of the genus Lymnocryptes...

 was observed on the island in 2007.

The Shiant Isles have a large population of seabird
Seabird
Seabirds are birds that have adapted to life within the marine environment. While seabirds vary greatly in lifestyle, behaviour and physiology, they often exhibit striking convergent evolution, as the same environmental problems and feeding niches have resulted in similar adaptations...

s, including tens of thousands Atlantic Puffin
Atlantic Puffin
The Atlantic Puffin is a seabird species in the auk family. It is a pelagic bird that feeds primarily by diving for fish, but also eats other sea creatures, such as squid and crustaceans. Its most obvious characteristic during the breeding season is its brightly coloured bill...

s breeding in burrows on the slopes of Garbh Eilean, as well as significant numbers of Common Guillemot
Common Guillemot
The Common Murre or Common Guillemot is a large auk. It is also known as the Thin-billed Murre in North America. It has a circumpolar distribution, occurring in low-Arctic and boreal waters in the North-Atlantic and North Pacific...

s, Razorbill
Razorbill
The Razorbill is colonial seabird that will only come to land in order to breed. It is the largest living member of the Auk family. This agile bird will choose only one partner for life and females will lay one egg per year. Razorbills will nest along coastal cliffs in enclosed or slightly exposed...

s, Northern Fulmar
Northern Fulmar
The Northern Fulmar, Fulmarus glacialis, Fulmar, or Arctic Fulmar is a highly abundant sea bird found primarily in subarctic regions of the north Atlantic and north Pacific oceans. Fulmars come in one of two color morphs: a light one which is almost entirely white, and a dark one which is...

s, Black-legged Kittiwake
Black-legged Kittiwake
The Black-legged Kittiwake is a seabird species in the gull family Laridae.This species was first described by Linnaeus in his Systema naturae in 1758 as Larus tridactylus....

s, Common Shag
Common Shag
The European Shag or Common Shag is a species of cormorant. It breeds around the rocky coasts of western and southern...

s, gull
Gull
Gulls are birds in the family Laridae. They are most closely related to the terns and only distantly related to auks, skimmers, and more distantly to the waders...

s and Great Skua
Great Skua
The Great Skua, Stercorarius skua, is a large seabird in the skua family Stercorariidae. In Britain, it is sometimes known by the name Bonxie, a Shetland name of unknown origin.-Description:...

s. Although St Kilda
St Kilda, Scotland
St Kilda is an isolated archipelago west-northwest of North Uist in the North Atlantic Ocean. It contains the westernmost islands of the Outer Hebrides of Scotland. The largest island is Hirta, whose sea cliffs are the highest in the United Kingdom and three other islands , were also used for...

 has more puffins, the sheer density on the Shiants is greater.

Berneray (North Uist)

The crofting practises on Berneray
Berneray, North Uist
Berneray is an island and community in the Sound of Harris, Scotland. It is one of fifteen inhabited islands in the Outer Hebrides. It is famed for its rich and colourful history which has attracted much tourism....

 encourage a wide array of birdlife. On early summer evenings you can sometimes hear snipe
Common Snipe
The Common Snipe is a small, stocky wader native to the Old World. The breeding habitat is marshes, bogs, tundra and wet meadows throughout northern Europe and northern Asia...

 drumming, and even the rasp of a corncrake. Mute swans can be seen on Loch Brusda, and greylag
Greylag Goose
The Greylag Goose , Anser anser, is a bird with a wide range in the Old World. It is the type species of the genus Anser....

 geese are common. In the winter they are joined by barnacle
Barnacle Goose
The Barnacle Goose belongs to the genus Branta of black geese, which contains species with largely black plumage, distinguishing them from the grey Anser species...

, and a few brent geese
Brent Goose
The Brant or Brent Goose, Branta bernicla, is a species of goose of the genus Branta. The Black Brant is an American subspecies. The specific descriptor bernicla is from the same source as "barnacle" in Barnacle Goose, which looks similar but is not a close relation.-Appearance:The Brant Goose is...

. Raven
Raven
Raven is the common name given to several larger-bodied members of the genus Corvus—but in Europe and North America the Common Raven is normally implied...

s and buzzard
Buzzard
A buzzard is one of several large birds, but there are a number of meanings as detailed below.-Old World:In the Old World Buzzard can mean:* One of several medium-sized, wide-ranging raptors with a robust body and broad wings....

s are often to be seen. Golden eagles
Golden Eagle
The Golden Eagle is one of the best known birds of prey in the Northern Hemisphere. Like all eagles, it belongs to the family Accipitridae. Once widespread across the Holarctic, it has disappeared from many of the more heavily populated areas...

 and hen harriers
Hen Harrier
The Hen Harrier or Northern Harrier is a bird of prey. It breeds throughout the northern parts of the northern hemisphere in Canada and the northernmost USA, and in northern Eurasia. This species is polytypic, with two subspecies. Marsh Hawk is a historical name for the American form.It migrates...

 are rarer sights, usually in the winter. Wading birds on the shore include redshanks
Common Redshank
The Common Redshank or simply Redshank is an Eurasian wader in the large family Scolopacidae.- Description and systematics :...

, sanderling
Sanderling
The Sanderling is a small wader. It is a circumpolar Arctic breeder, and is a long-distance migrant, wintering south to South America, South Europe, Africa, and Australia...

s, turnstone
Turnstone
Turnstones are the bird species in the genus Arenaria in the family Scolopacidae. They are closely related to calidrid sandpipers and might be considered members of the tribe Calidriini....

s, oyster catchers
Eurasian Oystercatcher
The Eurasian Oystercatcher Haematopus ostralegus, also known as the Common Pied Oystercatcher, or just Oystercatcher, is a wader in the oystercatcher bird family Haematopodidae. It is the most widespread of the oystercatchers, with three races breeding in western Europe, central Eurasia,...

, dunlin
Dunlin
The Dunlin, Calidris alpina, is a small wader, sometimes separated with the other "stints" in Erolia. It is a circumpolar breeder in Arctic or subarctic regions. Birds that breed in northern Europe and Asia are long-distance migrants, wintering south to Africa, southeast Asia and the Middle East...

, curlew
Curlew
The curlews , genus Numenius, are a group of eight species of birds, characterised by long, slender, downcurved bills and mottled brown plumage. They are one of the most ancient lineages of scolopacid waders, together with the godwits which look similar but have straight bills...

s, whimbrel
Whimbrel
The Whimbrel Numenius phaeopus, is a wader in the large family Scolopacidae. It is one of the mostwidespread of the curlews, breeding across much of subarctic North America, Europe and Asia as far south as Scotland....

s, ringed plovers
Ringed Plover
The Common Ringed Plover or Ringed Plover is a small plover.Adults are 17-19.5 cm in length with a 35–41 cm wingspan. They have a grey-brown back and wings, a white belly, and a white breast with one black neckband. They have a brown cap, a white forehead, a black mask around the eyes...

 and herons
Grey Heron
The Grey Heron , is a wading bird of the heron family Ardeidae, native throughout temperate Europe and Asia and also parts of Africa. It is resident in the milder south and west, but many birds retreat in winter from the ice in colder regions...

. Further out, around the shores of Berneray, are mallard
Mallard
The Mallard , or Wild Duck , is a dabbling duck which breeds throughout the temperate and subtropical Americas, Europe, Asia, and North Africa, and has been introduced to New Zealand and Australia....

s, eiders
Common Eider
The Common Eider, Somateria mollissima, is a large sea-duck that is distributed over the northern coasts of Europe, North America and eastern Siberia. It breeds in Arctic and some northern temperate regions, but winters somewhat farther south in temperate zones, when it can form large flocks on...

, red-breasted merganser
Red-breasted Merganser
The Red-breasted Merganser is a diving duck.-Taxonomy:The Red-breasted Merganser was one of the many species originally described by Linnaeus in his 18th-century work, Systema Naturae.-Description:...

s, and, more rarely, black-throated
Black-throated Diver
The Black-throated Loon is a migratory aquatic bird found in the northern hemisphere. The species is known as an Arctic Loon in North America and the Black-throated Diver in Eurasia, its current name is a compromise proposed by the International Ornithological Committee.-Taxonomy:The...

 and great northern diver
Great Northern Diver
The Great Northern Loon, Great Northern Diver, or Common Loon , is a large member of the loon, or diver, family of birds...

s. Shags
Common Shag
The European Shag or Common Shag is a species of cormorant. It breeds around the rocky coasts of western and southern...

 and cormorants
Great Cormorant
The Great Cormorant , known as the Great Black Cormorant across the Northern Hemisphere, the Black Cormorant in Australia and the Black Shag further south in New Zealand, is a widespread member of the cormorant family of seabirds...

 fish in the seas around Berneray throughout the year, and in summer you can see gannets
Northern Gannet
The Northern Gannet is a seabird and is the largest member of the gannet family, Sulidae.- Description :Young birds are dark brown in their first year, and gradually acquire more white in subsequent seasons until they reach maturity after five years.Adults are long, weigh and have a wingspan...

 diving.

St Kilda

St Kilda
St Kilda, Scotland
St Kilda is an isolated archipelago west-northwest of North Uist in the North Atlantic Ocean. It contains the westernmost islands of the Outer Hebrides of Scotland. The largest island is Hirta, whose sea cliffs are the highest in the United Kingdom and three other islands , were also used for...

 is a breeding ground for many important seabird
Seabird
Seabirds are birds that have adapted to life within the marine environment. While seabirds vary greatly in lifestyle, behaviour and physiology, they often exhibit striking convergent evolution, as the same environmental problems and feeding niches have resulted in similar adaptations...

 species. The world's largest colony of Northern Gannet
Northern Gannet
The Northern Gannet is a seabird and is the largest member of the gannet family, Sulidae.- Description :Young birds are dark brown in their first year, and gradually acquire more white in subsequent seasons until they reach maturity after five years.Adults are long, weigh and have a wingspan...

s, totalling 30,000 pairs, amount to 24 percent of the global population. There are 49,000 breeding pairs of Leach's Petrels
Leach's Storm-petrel
The Leach's Storm Petrel or Leach's Petrel is a small seabird of the tubenose family. It is named after the British zoologist William Elford Leach....

, up to 90 percent of the European population; 136,000 pairs of Atlantic Puffin
Atlantic Puffin
The Atlantic Puffin is a seabird species in the auk family. It is a pelagic bird that feeds primarily by diving for fish, but also eats other sea creatures, such as squid and crustaceans. Its most obvious characteristic during the breeding season is its brightly coloured bill...

s, about 30 percent of the UK total breeding population, and 67,000 Northern Fulmar
Northern Fulmar
The Northern Fulmar, Fulmarus glacialis, Fulmar, or Arctic Fulmar is a highly abundant sea bird found primarily in subarctic regions of the north Atlantic and north Pacific oceans. Fulmars come in one of two color morphs: a light one which is almost entirely white, and a dark one which is...

 pairs, about 13 percent of the UK total. Dùn is home to the largest colony of Fulmars in Britain. Prior to 1828, St Kilda was their only UK breeding ground, but they have since spread and established colonies elsewhere, such as Fowlsheugh
Fowlsheugh
Fowlsheugh is a coastal nature reserve in Kincardineshire, northeast Scotland, known for its seventy metre high cliff formations and habitat supporting prolific seabird nesting colonies. Designated as a Site of Special Scientific Interest by Scottish Natural Heritage, the property is owned by the...

. The last Great Auk
Great Auk
The Great Auk, Pinguinus impennis, formerly of the genus Alca, was a large, flightless alcid that became extinct in the mid-19th century. It was the only modern species in the genus Pinguinus, a group of birds that formerly included one other species of flightless giant auk from the Atlantic Ocean...

 (Pinguinus impennis) seen in Britain was killed on Stac an Armin in July 1840. Unusual behaviour by St Kilda's Bonxies
Great Skua
The Great Skua, Stercorarius skua, is a large seabird in the skua family Stercorariidae. In Britain, it is sometimes known by the name Bonxie, a Shetland name of unknown origin.-Description:...

 was recorded in 2007 during research into recent falls in the Leach's Petrel population. Using night vision gear, ecologists observed the skuas hunting petrels at night, a remarkable strategy for a seabird. A subspecies of Winter Wren
Winter Wren
The Winter Wren is a very small North American bird and a member of the mainly New World wren family Troglodytidae. It was once lumped with Troglodytes pacificus of western North America and Troglodytes troglodytes of Eurasia under the name Winter Wren.It breeds in coniferous forests from British...

, the St Kilda Wren
St Kilda Wren
The St Kilda Wren, Troglodytes troglodytes hirtensis, is a small passerine bird in the wren family. It is a distinctive subspecies of the Winter Wren endemic to the islands of the isolated St Kilda archipelago, in the Atlantic Ocean 64 km west of the Outer Hebrides, Scotland...

 Troglodytes troglodytes hirtensis, is unique to St Kilda.

Marine life

Salmon
Salmon
Salmon is the common name for several species of fish in the family Salmonidae. Several other fish in the same family are called trout; the difference is often said to be that salmon migrate and trout are resident, but this distinction does not strictly hold true...

 frequent several Lewis rivers after crossing the Atlantic. Many of the fresh-water lochs are home to fish such as trout
Trout
Trout is the name for a number of species of freshwater and saltwater fish belonging to the Salmoninae subfamily of the family Salmonidae. Salmon belong to the same family as trout. Most salmon species spend almost all their lives in salt water...

. Other freshwater fish present include arctic char
Arctic char
Arctic char or Arctic charr is both a freshwater and saltwater fish in the Salmonidae family, native to Arctic, sub-Arctic and alpine lakes and coastal waters. No other freshwater fish is found as far north. It is the only species of fish in Lake Hazen, on Ellesmere Island in the Canadian Arctic...

, Europe
Europe
Europe is, by convention, one of the world's seven continents. Comprising the westernmost peninsula of Eurasia, Europe is generally 'divided' from Asia to its east by the watershed divides of the Ural and Caucasus Mountains, the Ural River, the Caspian and Black Seas, and the waterways connecting...

an eel
Eel
Eels are an order of fish, which consists of four suborders, 20 families, 111 genera and approximately 800 species. Most eels are predators...

, 3 and 9 spined stickleback
Stickleback
The Gasterosteidae are a family of fish including the sticklebacks. FishBase currently recognises sixteen species in the family, grouped in five genera. However several of the species have a number of recognised subspecies, and the taxonomy of the family is thought to be in need of revision...

s, thick-lipped mullet
Mullet (fish)
The mullets or grey mullets are a family and order of ray-finned fish found worldwide in coastal temperate and tropical waters, and in some species in fresh water. Mullets have served as an important source of food in Mediterranean Europe since Roman times...

 and flounder
Flounder
The flounder is an ocean-dwelling flatfish species that is found in coastal lagoons and estuaries of the Northern Atlantic and Pacific Oceans.-Taxonomy:There are a number of geographical and taxonomical species to which flounder belong.*Western Atlantic...

.

Offshore, it is common to see seal
Pinniped
Pinnipeds or fin-footed mammals are a widely distributed and diverse group of semiaquatic marine mammals comprising the families Odobenidae , Otariidae , and Phocidae .-Overview: Pinnipeds are typically sleek-bodied and barrel-shaped...

s, particularly in Stornoway harbour, and with luck, dolphin
Dolphin
Dolphins are marine mammals that are closely related to whales and porpoises. There are almost forty species of dolphin in 17 genera. They vary in size from and , up to and . They are found worldwide, mostly in the shallower seas of the continental shelves, and are carnivores, mostly eating...

s, porpoise
Porpoise
Porpoises are small cetaceans of the family Phocoenidae; they are related to whales and dolphins. They are distinct from dolphins, although the word "porpoise" has been used to refer to any small dolphin, especially by sailors and fishermen...

s, shark
Shark
Sharks are a type of fish with a full cartilaginous skeleton and a highly streamlined body. The earliest known sharks date from more than 420 million years ago....

s and even the occasional whale
Whale
Whale is the common name for various marine mammals of the order Cetacea. The term whale sometimes refers to all cetaceans, but more often it excludes dolphins and porpoises, which belong to suborder Odontoceti . This suborder also includes the sperm whale, killer whale, pilot whale, and beluga...

 can be encountered.

Occasional turtles, mainly loggerhead and leathery, may be met in coastal waters.

In Great Bernera
Great Bernera
Great Bernera , often known just as Bernera is an island and community in the Outer Hebrides of Scotland. With an area of just over , it is the thirty-fourth largest Scottish island....

, sea life is especially rich where there is tidal run between the Caolas Bhalasaigh (English: "Valasay Straits/Kyles") and the inner sea-loch of Tòb Bhalasaigh. There are numerous molluscs
Mollusca
The Mollusca , common name molluscs or mollusksSpelled mollusks in the USA, see reasons given in Rosenberg's ; for the spelling mollusc see the reasons given by , is a large phylum of invertebrate animals. There are around 85,000 recognized extant species of molluscs. Mollusca is the largest...

, sponges, brittlestars
Brittle star
Brittle stars or ophiuroids are echinoderms in the class Ophiuroidea closely related to starfish. They crawl across the seafloor using their flexible arms for locomotion. The ophiuroids generally have five long slender, whip-like arms which may reach up to in length on the largest specimens...

 and starfish, the latter growing noticeably larger in size than normal. Cup Coral, Snakelocks Anemone
Snakelocks anemone
The snakelocks anemone is a sea anemone found in the eastern Atlantic ocean to the Mediterranean sea.The tentacles of anemones in deep or murky water can be a grey colour but are otherwise usually a deep green colour with purple tips. This is due to the presence of symbiotic algae within the...

 and Dead man's fingers
Alcyonacea
The Alcyonacea, or the soft corals are an order of corals which do not produce calcium carbonate skeletons. Soft corals contain minute, spiny skeletal elements called sclerites. Aside from their scientific utility in species identification, sclerites give these corals some degree of support and...

 coral, may also be found here. Common fish include Shanny and Butterfish and Atlantic
Grey Seal
The grey seal is found on both shores of the North Atlantic Ocean. It is a large seal of the family Phocidae or "true seals". It is the only species classified in the genus Halichoerus...

 and Common Seals are regular off-shore visitors.

Common seals often congregate at low tide on the rocks in Bays Loch in Berneray (North Uist), Grey seals
Grey Seal
The grey seal is found on both shores of the North Atlantic Ocean. It is a large seal of the family Phocidae or "true seals". It is the only species classified in the genus Halichoerus...

, which are larger and can be distinguished by the long noses, are also to be found there occasionally, but are more common off the West Beach. The grey seal
Grey Seal
The grey seal is found on both shores of the North Atlantic Ocean. It is a large seal of the family Phocidae or "true seals". It is the only species classified in the genus Halichoerus...

 now breeds on Hirta but did not do so before the 1930 evacuation.

The beach at Village Bay in St Kilda is unusual in that its short stretch of summer sand recedes in winter, exposing the large boulders on which it rests. A survey of the beach in 1953 found only a single resident species, the crustacean isopod Eurydice pulchra
Eurydice pulchra
Eurydice pulchra, the speckled sea louse, is a species of isopod crustacean found in the northeast Atlantic Ocean. Its range extends from Norway to the Atlantic coast of Morocco, but not into the Mediterranean Sea. It lives in the intertidal zone on sandy shores. It has large eyes and long...

.

Amongst the more exotic species found off the Outer Hebrides, is the giant squid
Giant squid
The giant squid is a deep-ocean dwelling squid in the family Architeuthidae, represented by as many as eight species...

 (Architeuthis) - specimens are occasionally washed up on the islands.http://siris-bibliographies.si.edu/ipac20/ipac.jsp?uri=full=3100001~!12955!0

Land mammals

There are only two native land mammals in the Western Isles, red deer
Deer
Deer are the ruminant mammals forming the family Cervidae. Species in the Cervidae family include white-tailed deer, elk, moose, red deer, reindeer, fallow deer, roe deer and chital. Male deer of all species and female reindeer grow and shed new antlers each year...

 and otter
Otter
The Otters are twelve species of semi-aquatic mammals which feed on fish and shellfish, and also other invertebrates, amphibians, birds and small mammals....

. The rabbit
Rabbit
Rabbits are small mammals in the family Leporidae of the order Lagomorpha, found in several parts of the world...

, blue hare
Hare
Hares and jackrabbits are leporids belonging to the genus Lepus. Hares less than one year old are called leverets. Four species commonly known as types of hare are classified outside of Lepus: the hispid hare , and three species known as red rock hares .Hares are very fast-moving...

, hedgehog
Hedgehog
A hedgehog is any of the spiny mammals of the subfamily Erinaceinae and the order Erinaceomorpha. There are 17 species of hedgehog in five genera, found through parts of Europe, Asia, Africa, and New Zealand . There are no hedgehogs native to Australia, and no living species native to the Americas...

, brown and black rat
Rat
Rats are various medium-sized, long-tailed rodents of the superfamily Muroidea. "True rats" are members of the genus Rattus, the most important of which to humans are the black rat, Rattus rattus, and the brown rat, Rattus norvegicus...

, feral cat
Feral cat
A feral cat is a descendant of a domesticated cat that has returned to the wild. It is distinguished from a stray cat, which is a pet cat that has been lost or abandoned, while feral cats are born in the wild; the offspring of a stray cat can be considered feral if born in the wild.In many parts of...

, Mink
Mink
There are two living species referred to as "mink": the European Mink and the American Mink. The extinct Sea Mink is related to the American Mink, but was much larger. All three species are dark-colored, semi-aquatic, carnivorous mammals of the family Mustelidae, which also includes the weasels and...

 and polecat
Weasel
Weasels are mammals forming the genus Mustela of the Mustelidae family. They are small, active predators, long and slender with short legs....

 were introduced by man. The origin of mice
Mouse
A mouse is a small mammal belonging to the order of rodents. The best known mouse species is the common house mouse . It is also a popular pet. In some places, certain kinds of field mice are also common. This rodent is eaten by large birds such as hawks and eagles...

 and vole
Vole
A vole is a small rodent resembling a mouse but with a stouter body, a shorter hairy tail, a slightly rounder head, smaller ears and eyes, and differently formed molars . There are approximately 155 species of voles. They are sometimes known as meadow mice or field mice in North America...

s is uncertain.

There has been considerable controversy over hedgehog
European Hedgehog
The European Hedgehog , Common hedgehog or just Hedgehog in the anglophone parts of Europe, is a hedgehog species found in northern and western Europe. It is about 20 to 30 cm in length. Adult mass typically ranges from 600 to up to 1,200 g ; occasionally, it may reach as much as...

s on South Uist. The animals are not native to the islands, having been introduced in the 1970s to reduce garden pests. They now pose a threat to the eggs of ground nesting wading birds on the reserve. In 2003 Scottish Natural Heritage undertook a cull of hedgehogs in the area.

American Mink
American Mink
The American mink is a semi-aquatic species of Mustelid native to North America, though human intervention has expanded its range to many parts of Europe and South America. Because of this, it is classed as Least Concern by the IUCN. Since the extinction of the sea mink, the American mink is the...

 are another introduced species (escapees from fur farms
Fur farming
Fur farming is the practice of breeding or raising certain types of animals for their fur.Fur used from wild caught animals is not farmed, and is instead known as 'free range fur' because the animals have lived their lives free and natural in the wild....

) and cause problems for native ground-nesting birds, the local fishing industry and poultry farmers. Due to this impact and following a successful eradication of the species from the Uists and Barra, the second and ongoing phase of the Hebridean Mink Project aims to rid mink from Lewis and Harris in similar fashion.

The Shiant Isles are home to a colony of Black Rat
Black Rat
The black rat is a common long-tailed rodent of the genus Rattus in the subfamily Murinae . The species originated in tropical Asia and spread through the Near East in Roman times before reaching Europe by the 1st century and spreading with Europeans across the world.-Taxonomy:The black rat was...

s, which may originally have come ashore from a shipwreck. Apart from one or two small islands in the Firth of Forth
Firth of Forth
The Firth of Forth is the estuary or firth of Scotland's River Forth, where it flows into the North Sea, between Fife to the north, and West Lothian, the City of Edinburgh and East Lothian to the south...

, the Shiants are the only place in the UK where the black rat or ship's rat (Rattus rattus) can still be found. There are thought to be about 3,000 rats on the islands. Analysis of their stomach contents has shown that the Shiant rats do eat seabirds, but it is impossible to tell if they prey on live birds or simply scavenge dead remains.

A subspecies of Wood Mouse
Wood mouse
The wood mouse is a common murid rodent from Europe and northwestern Africa. It is closely related to the yellow-necked mouse but differs in that it has no band of yellow fur around the neck, has slightly smaller ears, and is usually slightly smaller overall: around 90 mm in length...

 known as the St Kilda Field Mouse
St Kilda Field Mouse
The St Kilda Field Mouse is a subspecies of wood mouse endemic to the Scottish isles of St Kilda. It is generally twice as heavy as mainland field mice and has longer hair and a longer tail. It is mostly grey in colour and, though hard to find, very common.It is not to be confused with the St...

 (Apodemus sylvaticus hirtensis) is unique to St Kilda. A subspecies of House Mouse
House mouse
The house mouse is a small rodent, a mouse, one of the most numerous species of the genus Mus.As a wild animal the house mouse mainly lives associated with humans, causing damage to crops and stored food....

 known as Mus musculus muralis
St Kilda House Mouse
The St Kilda House Mouse was a subspecies of the house mouse found only on the islands of the St Kilda archipelago of northwest Scotland....

, vanished completely after the evacuation of human inhabitants, as it was strictly associated with settlements and buildings. It had a number of traits in common with a sub-species (Mus musculus mykinessiensis) found on Mykines island in the Faroe Islands
Faroe Islands
The Faroe Islands are an island group situated between the Norwegian Sea and the North Atlantic Ocean, approximately halfway between Scotland and Iceland. The Faroe Islands are a self-governing territory within the Kingdom of Denmark, along with Denmark proper and Greenland...

.

The St Kildans kept up to 2,000 sheep, which were removed at the time of the evacuation, but a herd of 107 indigenous Soay sheep
Soay sheep
The Soay sheep is a primitive breed of domestic sheep descended from a population of feral sheep on the island of Soay in the St. Kilda Archipelago, about from the Western Isles of Scotland...

 were transferred onto Hirta from Soay and now live in a feral
Feral
A feral organism is one that has changed from being domesticated to being wild or untamed. In the case of plants it is a movement from cultivated to uncultivated or controlled to volunteer. The introduction of feral animals or plants to their non-native regions, like any introduced species, may...

 state. Soay sheep are a very primitive breed that do not require shearing
Sheep shearing
Sheep shearing, shearing or clipping is the process by which the woollen fleece of a sheep is cut off. The person who removes the sheep's wool is called a shearer. Typically each adult sheep is shorn once each year...

. Numbers vary from 600 to 1,700 on Hirta, and 200 remain on Soay. A few have been exported to form breeding populations in other nations, where they are valued for their hardiness and small size. On Hirta and Soay, they prefer the plantago
Plantago
Plantago is a genus of about 200 species of small, inconspicuous plants commonly called plantains. They share this name with the very dissimilar plantain, a kind of banana. Most are herbaceous plants, though a few are subshrubs growing to 60 cm tall. The leaves are sessile, but have a narrow...

 pastures, which grow well in locations exposed to sea spray
Sea spray
Sea spray is a spray of water that forms when ocean waves crash.-Make up:As a result, salt spray contains a high concentration of mineral salts, particularly chloride anions.-Effects:...

 and include Red Fescue
Fescue
Festuce is a genus of about 300 species of perennial tufted grasses, belonging to the grass family Poaceae . The genus has a cosmopolitan distribution, although the majority of the species are found in cool temperate areas...

, Sea Plantain
Plantago
Plantago is a genus of about 200 species of small, inconspicuous plants commonly called plantains. They share this name with the very dissimilar plantain, a kind of banana. Most are herbaceous plants, though a few are subshrubs growing to 60 cm tall. The leaves are sessile, but have a narrow...

 and Sea Pink
Armeria maritima
Armeria maritima is the botanical name for a species of flowering plant.It is a popular garden flower, known by several common names, including thrift, sea thrift, and sea pink. The plant has been distributed worldwide as a garden and cut flower...

. There is also a breed of feral sheep
Boreray (sheep)
The Boreray is a breed of sheep originating on the St Kilda archipelago off the west coast of Scotland and surviving as a feral animal on one of the islands, Boreray. It is primarily a meat breed...

 residing on Boreray, which is one the most endangered British ovines in existence.

There are claims that the Stornoway castle grounds are home to bat
Bat
Bats are mammals of the order Chiroptera "hand" and pteron "wing") whose forelimbs form webbed wings, making them the only mammals naturally capable of true and sustained flight. By contrast, other mammals said to fly, such as flying squirrels, gliding possums, and colugos, glide rather than fly,...

s. In addition, there are farmed animals such as sheep, cattle
Cattle
Cattle are the most common type of large domesticated ungulates. They are a prominent modern member of the subfamily Bovinae, are the most widespread species of the genus Bos, and are most commonly classified collectively as Bos primigenius...

 and a few pig
Pig
A pig is any of the animals in the genus Sus, within the Suidae family of even-toed ungulates. Pigs include the domestic pig, its ancestor the wild boar, and several other wild relatives...

s.

Reptiles and amphibians

In common with Ireland
Ireland
Ireland is an island to the northwest of continental Europe. It is the third-largest island in Europe and the twentieth-largest island on Earth...

, no snakes inhabit Lewis, only the slow-worm which is merely mistaken for a snake. Actually a legless lizard, it is the sole member of its order present. The common frog
Frog
Frogs are amphibians in the order Anura , formerly referred to as Salientia . Most frogs are characterized by a short body, webbed digits , protruding eyes and the absence of a tail...

 may be found in the centre of the island though it, along with any newts or toads present are introduced species.

Insects

The island's most famous insect resident is the Highland midge
Highland midge
The Highland midge is a species of small flying insect, found in upland and lowland areas especially in the north west of Scotland from late spring to late summer...

 which is ever-present near water at certain times of the year.

During the summer months, several species of butterflies
Butterfly
A butterfly is a mainly day-flying insect of the order Lepidoptera, which includes the butterflies and moths. Like other holometabolous insects, the butterfly's life cycle consists of four parts: egg, larva, pupa and adult. Most species are diurnal. Butterflies have large, often brightly coloured...

 and dragon flies
Dragonfly
A dragonfly is a winged insect belonging to the order Odonata, the suborder Epiprocta or, in the strict sense, the infraorder Anisoptera . It is characterized by large multifaceted eyes, two pairs of strong transparent wings, and an elongated body...

 can be found, especially outwith Stornoway.

The richness of insect-life in Lewis is evident from the fact that carnivorous plants, such as the sundew
Sundew
Drosera, commonly known as the sundews, comprise one of the largest genera of carnivorous plants, with at least 194 species. These members of the family Droseraceae lure, capture, and digest insects using stalked mucilaginous glands covering their leaf surface. The insects are used to supplement...

, thrive in parts of the island.

Plant life

The machair is noted for different species of orchid and associated vegetation such as various grass
Grass
Grasses, or more technically graminoids, are monocotyledonous, usually herbaceous plants with narrow leaves growing from the base. They include the "true grasses", of the Poaceae family, as well as the sedges and the rushes . The true grasses include cereals, bamboo and the grasses of lawns ...

es. Three heathers
Calluna
Calluna vulgaris is the sole species in the genus Calluna in the family Ericaceae. It is a low-growing perennial shrub growing to tall, or rarely to and taller, and is found widely in Europe and Asia Minor on acidic soils in open sunny situations and in moderate shade...

; ling, bell heather and cross-leaved heather are predominant in the large areas of moorland
Moorland
Moorland or moor is a type of habitat, in the temperate grasslands, savannas, and shrublands biome, found in upland areas, characterised by low-growing vegetation on acidic soils and heavy fog...

 vegetation which also holds large numbers of insectivorous plants such as sundew
Sundew
Drosera, commonly known as the sundews, comprise one of the largest genera of carnivorous plants, with at least 194 species. These members of the family Droseraceae lure, capture, and digest insects using stalked mucilaginous glands covering their leaf surface. The insects are used to supplement...

s. The expanse of heather-covered moorland explains the name Eilean an Fhraoich, Gaelic for The Heather Isle.

Lewis was once covered by woodland, but the only natural woods remaining are in small pockets on inland cliffs and on islands within lochs, away from fire and sheep. In recent years, Forestry Commission
Forestry Commission
The Forestry Commission is a non-ministerial government department responsible for forestry in Great Britain. Its mission is to protect and expand Britain's forests and woodlands and increase their value to society and the environment....

 plantations of spruce
Spruce
A spruce is a tree of the genus Picea , a genus of about 35 species of coniferous evergreen trees in the Family Pinaceae, found in the northern temperate and boreal regions of the earth. Spruces are large trees, from tall when mature, and can be distinguished by their whorled branches and conical...

 and pine
Pine
Pines are trees in the genus Pinus ,in the family Pinaceae. They make up the monotypic subfamily Pinoideae. There are about 115 species of pine, although different authorities accept between 105 and 125 species.-Etymology:...

 were planted; but, most of the pines were destroyed by moth
Moth
A moth is an insect closely related to the butterfly, both being of the order Lepidoptera. Moths form the majority of this order; there are thought to be 150,000 to 250,000 different species of moth , with thousands of species yet to be described...

 infestation. The most important mixed woods are those planted around Lews Castle
Lews Castle
Lews Castle is a Victorian era castle located west of the town of Stornoway, Isle of Lewis, Scotland. It was built in the years 1847-57 as a country house for Sir James Matheson who had bought the whole island a few years previously with his fortune from the Chinese Opium trade...

 in Stornoway, dating from the mid 19th century.

Bonnie Prince Charlie's flower (Calystegia soldanella
Calystegia
Calystegia is a genus of about 25 species of flowering plants in the bindweed family Convolvulaceae. The genus has a cosmopolitan distribution in temperate and subtropical regions, but with half of the species endemic to California...

), reputedly originating from French seeds dropped by Bonnie Prince Charlie is, in Scotland, found only on Vatersay
Vatersay
Vatersay is an inhabited island in the Outer Hebrides of Scotland. Vatersay is also the name of the only village on the island.-Location:The westernmost permanently inhabited place in Scotland, Vatersay is linked to Barra by a causeway completed in 1991...

 and Eriskay
Eriskay
Eriskay , from the Old Norse for "Eric's Isle", is an island and community council area of the Outer Hebrides in northern Scotland. It lies between South Uist and Barra and is connected to South Uist by a causeway which was opened in 2001. In the same year Eriskay became the ferry terminal for...

.

Plant life in St Kilda is heavily influenced by the salt spray, strong winds and acidic peat
Peat
Peat is an accumulation of partially decayed vegetation matter or histosol. Peat forms in wetland bogs, moors, muskegs, pocosins, mires, and peat swamp forests. Peat is harvested as an important source of fuel in certain parts of the world...

y soils. No trees grow on the archipelago, although there are more than 130 different flowering plants, 162 species of fungi and 160 bryophyte
Bryophyte
Bryophyte is a traditional name used to refer to all embryophytes that do not have true vascular tissue and are therefore called 'non-vascular plants'. Some bryophytes do have specialized tissues for the transport of water; however since these do not contain lignin, they are not considered to be...

s. Several rarities exist amongst the 194 lichen
Lichen
Lichens are composite organisms consisting of a symbiotic organism composed of a fungus with a photosynthetic partner , usually either a green alga or cyanobacterium...

 species. Kelp
Kelp
Kelps are large seaweeds belonging to the brown algae in the order Laminariales. There are about 30 different genera....

 thrives in the surrounding seas, which contain a diversity of unusual marine invertebrates.

On Mingulay there is but a single tree — a 2 metre high poplar
Poplar
Populus is a genus of 25–35 species of deciduous flowering plants in the family Salicaceae, native to most of the Northern Hemisphere. English names variously applied to different species include poplar , aspen, and cottonwood....

 on a cliff overlooking Mingulay Bay. Sea Holly
Sea holly
The Sea holly is a species of Eryngium in the plant family Apiaceae and native to most European coastlines. In some ways, it resembles a flowering thistle, in that its flower is burr-shaped, though these are metallic blue, rather than mauve. The protected dune plant grows to a height of 20 to...

, otherwise rare in the Western Isles, has grown on Mingulay since at least the late nineteenth century, and Sea Milkwort, normally only found at sea level is able to grow on the high cliff tops due to the ocean spray and seagull manure.

Isle of Lewis

There are 15 SSSIs on Lewis in the biology category, spread across the island. Additionally, the Lewis Peatlands are recognised by Scottish Natural Heritage
Scottish Natural Heritage
Scottish Natural Heritage is a Scottish public body. It is responsible for Scotland's natural heritage, especially its natural, genetic and scenic diversity. It advises the Scottish Government and acts as a government agent in the delivery of conservation designations, i.e...

 as a Special Protection Area
Special Protection Area
A Special Protection Area or SPA is a designation under the European Union Directive on the Conservation of Wild Birds.Under the Directive, Member States of the European Union have a duty to safeguard the habitats of migratory birds and certain particularly threatened birds.Together with Special...

, Special Area of Conservation
Special Area of Conservation
A Special Area of Conservation is defined in the European Union's Habitats Directive , also known as the Directive on the Conservation of Natural Habitats and of Wild Fauna and Flora...

 and a Ramsar
Ramsar Convention
The Ramsar Convention is an international treaty for the conservation and sustainable utilization of wetlands, i.e., to stem the progressive encroachment on and loss of wetlands now and in the future, recognizing the fundamental ecological functions of wetlands and their economic, cultural,...

 site, showing their importance as a wetland habitat for migratory and resident bird life.

Balranald RSPB Reserve

Situated on the extreme western point of North Uist, the RSPB reserve at Balranald includes sandy beaches, rocky foreshore, marshes and sand dunes. An information centre explains the importance of traditional crofting agriculture for corncrakes and other wildlife.

Many wading and farmland birds nest on the flower-rich machair and croft-land - perhaps your best chance to hear and to even see corncrakes.

South Uist Nature Reserve

Loch Druidibeg in the north of the island is a National Nature Reserve
National Nature Reserve
For details of National nature reserves in the United Kingdom see:*National Nature Reserves in England*National Nature Reserves in Northern Ireland*National Nature Reserves in Scotland*National Nature Reserves in Wales...

 owned and managed by Scottish Natural Heritage
Scottish Natural Heritage
Scottish Natural Heritage is a Scottish public body. It is responsible for Scotland's natural heritage, especially its natural, genetic and scenic diversity. It advises the Scottish Government and acts as a government agent in the delivery of conservation designations, i.e...

. The reserve covers 1,677 hectares of machair
Machair (geography)
The machair refers to a fertile low-lying grassy plain found on some of the north-west coastlines of Ireland and Scotland, in particular the Outer Hebrides...

, bog
Bog
A bog, quagmire or mire is a wetland that accumulates acidic peat, a deposit of dead plant material—often mosses or, in Arctic climates, lichens....

, freshwater loch
Loch
Loch is the Irish and Scottish Gaelic word for a lake or a sea inlet. It has been anglicised as lough, although this is pronounced the same way as loch. Some lochs could also be called a firth, fjord, estuary, strait or bay...

s, estuary
Estuary
An estuary is a partly enclosed coastal body of water with one or more rivers or streams flowing into it, and with a free connection to the open sea....

 heather moorland and hill. Over 200 species of flowering plants have been recorded on the reserve, some of which are nationally scarce. South Uist is considered the best place in the UK for the aquatic plant Slender Naiad (Najas flexilis) which is a European Protected Species
European Protected Species
European Protected Species are species of plants and animals protected by law throughout the European Union. They are listed in Annexes II and IV of the European Habitats Directive....

.

Nationally important populations of breeding waders are also present, including redshank
Common Redshank
The Common Redshank or simply Redshank is an Eurasian wader in the large family Scolopacidae.- Description and systematics :...

, dunlin
Dunlin
The Dunlin, Calidris alpina, is a small wader, sometimes separated with the other "stints" in Erolia. It is a circumpolar breeder in Arctic or subarctic regions. Birds that breed in northern Europe and Asia are long-distance migrants, wintering south to Africa, southeast Asia and the Middle East...

, lapwing
Northern Lapwing
The Northern Lapwing , also known as the Peewit, Green Plover or just Lapwing, is a bird in the plover family. It is common through temperate Eurasia....

 and ringed plover
Ringed Plover
The Common Ringed Plover or Ringed Plover is a small plover.Adults are 17-19.5 cm in length with a 35–41 cm wingspan. They have a grey-brown back and wings, a white belly, and a white breast with one black neckband. They have a brown cap, a white forehead, a black mask around the eyes...

. The reserve is also home to greylag geese
Greylag Goose
The Greylag Goose , Anser anser, is a bird with a wide range in the Old World. It is the type species of the genus Anser....

 on the loch and in summer corncrake
Corn Crake
The Corn Crake, Corncrake or Landrail is a bird in the rail family. It breeds in Europe and Asia as far east as western China, and migrates to Africa for the winter...

s on the machair. Otter
European Otter
The European Otter , also known as the Eurasian otter, Eurasian river otter, common otter and Old World otter, is a European and Asian member of the Lutrinae or otter subfamily, and is typical of freshwater otters....

s and hen harrier
Hen Harrier
The Hen Harrier or Northern Harrier is a bird of prey. It breeds throughout the northern parts of the northern hemisphere in Canada and the northernmost USA, and in northern Eurasia. This species is polytypic, with two subspecies. Marsh Hawk is a historical name for the American form.It migrates...

s are also seen.

Monach Islands Nature Reserve

The Monach Islands
Monach Islands
Not to be confused with Heysker/Hyskeir or HaskeirThe Monach Islands, also known as Heisker , are an island group west of North Uist in the Outer Hebrides of Scotland...

 are a National Nature Reserve
National Nature Reserves in Scotland
National Nature Reserves in Scotland are established by Scottish Natural Heritage. Until 2004 there were 73 National Nature Reserves in Scotland, as per the list below...

 for the undisturbed machair and their Grey Seal
Grey Seal
The grey seal is found on both shores of the North Atlantic Ocean. It is a large seal of the family Phocidae or "true seals". It is the only species classified in the genus Halichoerus...

 population. About 10,000 come ashore each autumn to have their pups and mate, making it one of the largest such colonies in the world. There are also a large number of nesting seabird
Seabird
Seabirds are birds that have adapted to life within the marine environment. While seabirds vary greatly in lifestyle, behaviour and physiology, they often exhibit striking convergent evolution, as the same environmental problems and feeding niches have resulted in similar adaptations...

s and a rich flora. Grey Heron
Grey Heron
The Grey Heron , is a wading bird of the heron family Ardeidae, native throughout temperate Europe and Asia and also parts of Africa. It is resident in the milder south and west, but many birds retreat in winter from the ice in colder regions...

s nest in some of the abandoned buildings.

Mingulay and Berneray

Mingulay and nearby Berneray
Barra Head
Barra Head, also known as Berneray , is the southernmost of the Outer Hebrides in Scotland. Within the Outer Hebrides, it forms part of the Barra Isles archipelago. Originally, Barra Head only referred to the southernmost headland of Berneray but is now a common name for the entire island...

 became a Site of Special Scientific Interest
Site of Special Scientific Interest
A Site of Special Scientific Interest is a conservation designation denoting a protected area in the United Kingdom. SSSIs are the basic building block of site-based nature conservation legislation and most other legal nature/geological conservation designations in Great Britain are based upon...

 in 1983.
Mingulay has a large seabird
Seabird
Seabirds are birds that have adapted to life within the marine environment. While seabirds vary greatly in lifestyle, behaviour and physiology, they often exhibit striking convergent evolution, as the same environmental problems and feeding niches have resulted in similar adaptations...

 population, and is an important breeding ground for razorbill
Razorbill
The Razorbill is colonial seabird that will only come to land in order to breed. It is the largest living member of the Auk family. This agile bird will choose only one partner for life and females will lay one egg per year. Razorbills will nest along coastal cliffs in enclosed or slightly exposed...

s (9,514 pairs, 6.3% of the European population), guillemots
Common Guillemot
The Common Murre or Common Guillemot is a large auk. It is also known as the Thin-billed Murre in North America. It has a circumpolar distribution, occurring in low-Arctic and boreal waters in the North-Atlantic and North Pacific...

 (11,063 pairs) and Black-legged Kittiwake
Black-legged Kittiwake
The Black-legged Kittiwake is a seabird species in the gull family Laridae.This species was first described by Linnaeus in his Systema naturae in 1758 as Larus tridactylus....

s (2,939 pairs). Shags
Common Shag
The European Shag or Common Shag is a species of cormorant. It breeds around the rocky coasts of western and southern...

 (694 individuals), fulmar
Northern Fulmar
The Northern Fulmar, Fulmarus glacialis, Fulmar, or Arctic Fulmar is a highly abundant sea bird found primarily in subarctic regions of the north Atlantic and north Pacific oceans. Fulmars come in one of two color morphs: a light one which is almost entirely white, and a dark one which is...

 (11,626 pairs), puffins
Atlantic Puffin
The Atlantic Puffin is a seabird species in the auk family. It is a pelagic bird that feeds primarily by diving for fish, but also eats other sea creatures, such as squid and crustaceans. Its most obvious characteristic during the breeding season is its brightly coloured bill...

 (2,072 pairs), storm petrel, common tern
Common Tern
The Common Tern is a seabird of the tern family Sternidae. This bird has a circumpolar distribution, breeding in temperate and sub-Arctic regions of Europe, Asia and east and central North America. It is strongly migratory, wintering in coastal tropical and subtropical regions. It is sometimes...

s, arctic tern
Arctic Tern
The Arctic Tern is a seabird of the tern family Sternidae. This bird has a circumpolar breeding distribution covering the Arctic and sub-Arctic regions of Europe, Asia, and North America...

s, bonxies
Great Skua
The Great Skua, Stercorarius skua, is a large seabird in the skua family Stercorariidae. In Britain, it is sometimes known by the name Bonxie, a Shetland name of unknown origin.-Description:...

 and various species of gull
Gull
Gulls are birds in the family Laridae. They are most closely related to the terns and only distantly related to auks, skimmers, and more distantly to the waders...

 also nest in the sea-cliffs. Manx shearwater
Manx Shearwater
The Manx Shearwater is a medium-sized shearwater in the seabird family Procellariidae. The scientific name of this species records a name shift: Manx Shearwaters were called Manks Puffins in the 17th century. Puffin is an Anglo-Norman word for the cured carcasses of nestling shearwaters...

s nested on Lianamul stack until the late 18th century, when they were driven away by puffins, and tysties
Black Guillemot
The Black Guillemot or Tystie is a medium-sized alcid.Adult birds have black bodies with a white wing patch, a thin dark bill, and red legs and feet. They show white wing linings in flight. In winter, the upperparts are pale grey and the underparts are white. The wings remain black with the large...

 have also been recorded there.

Sheep graze the island’s rough pastures and there is a population of rabbit
Rabbit
Rabbits are small mammals in the family Leporidae of the order Lagomorpha, found in several parts of the world...

s, introduced by shepherds after the 1912 evacuation. Grey seal
Grey Seal
The grey seal is found on both shores of the North Atlantic Ocean. It is a large seal of the family Phocidae or "true seals". It is the only species classified in the genus Halichoerus...

s are abundant, numbers having grown substantially since the departure of human residents. Although they do not breed, up to 1,000 make use of the beach in winter.

Flannan Isles

The Flannan Isles
Flannan Isles
Designed by David Alan Stevenson, the tower was constructed for the Northern Lighthouse Board between 1895 and 1899 and is located near the highest point on Eilean Mòr. Construction was undertaken by George Lawson of Rutherglen at a cost of £6,914 inclusive of the building of the landing places,...

 provide nesting for a population of seabird
Seabird
Seabirds are birds that have adapted to life within the marine environment. While seabirds vary greatly in lifestyle, behaviour and physiology, they often exhibit striking convergent evolution, as the same environmental problems and feeding niches have resulted in similar adaptations...

s, including Atlantic Puffin
Atlantic Puffin
The Atlantic Puffin is a seabird species in the auk family. It is a pelagic bird that feeds primarily by diving for fish, but also eats other sea creatures, such as squid and crustaceans. Its most obvious characteristic during the breeding season is its brightly coloured bill...

s, Northern Fulmar
Northern Fulmar
The Northern Fulmar, Fulmarus glacialis, Fulmar, or Arctic Fulmar is a highly abundant sea bird found primarily in subarctic regions of the north Atlantic and north Pacific oceans. Fulmars come in one of two color morphs: a light one which is almost entirely white, and a dark one which is...

s, European Storm-petrel
European Storm-petrel
The European Storm Petrel or Storm Petrel is a small bird of the storm-petrel family, Hydrobatidae, part of the seabird order Procellariiformes. It is the only member of the genus Hydrobates.-Description:...

s, Leach's Petrels, Common Shag
Common Shag
The European Shag or Common Shag is a species of cormorant. It breeds around the rocky coasts of western and southern...

 and Black-legged Kittiwake
Black-legged Kittiwake
The Black-legged Kittiwake is a seabird species in the gull family Laridae.This species was first described by Linnaeus in his Systema naturae in 1758 as Larus tridactylus....

s. There is a gannet
Gannet
Gannets are seabirds comprising the genus Morus, in the family Sulidae, closely related to the boobies.The gannets are large black and white birds with yellow heads. They have long pointed wings and long bills. Northern gannets are the largest seabirds in the North Atlantic, with a wingspan of up...

ry on Roaireim. From the late Middle Ages
Middle Ages
The Middle Ages is a periodization of European history from the 5th century to the 15th century. The Middle Ages follows the fall of the Western Roman Empire in 476 and precedes the Early Modern Era. It is the middle period of a three-period division of Western history: Classic, Medieval and Modern...

 on, Lewismen regularly raided these nests for eggs, birds and feathers.

There is a population of Arctic Hare
Arctic Hare
The arctic hare , or polar rabbit is a species of hare which is adapted largely to polar and mountainous habitats. The arctic hare survives with a thick coat of fur and usually digs holes under the ground or snow to keep warm and sleep...

s, brought to the islands by the lighthouse keepers, and crofters from Bernera graze sheep on the most fertile islands.

Minke and Pilot Whales, as well as Risso's and other species of dolphin
Dolphin
Dolphins are marine mammals that are closely related to whales and porpoises. There are almost forty species of dolphin in 17 genera. They vary in size from and , up to and . They are found worldwide, mostly in the shallower seas of the continental shelves, and are carnivores, mostly eating...

 are commonly observed in the vicinity.

The islands became a Site of Special Scientific Interest
Site of Special Scientific Interest
A Site of Special Scientific Interest is a conservation designation denoting a protected area in the United Kingdom. SSSIs are the basic building block of site-based nature conservation legislation and most other legal nature/geological conservation designations in Great Britain are based upon...

 in December 1983.

St Kilda

On his death on 14 August 1956, the Marquess of Bute's will bequeathed the archipelago to the National Trust for Scotland
National Trust for Scotland
The National Trust for Scotland for Places of Historic Interest or Natural Beauty, commonly known as the National Trust for Scotland describes itself as the conservation charity that protects and promotes Scotland's natural and cultural heritage for present and future generations to...

 provided they accepted the offer within six months. After much soul-searching, the Executive Committee agreed to do so in January 1957. The slow renovation and conservation of the village began, much of it undertaken by summer volunteer work parties. In addition, scientific research began on the feral Soay sheep population and other aspects of the natural environment. In 1957 the area was designated a National Nature Reserve
National Nature Reserve
For details of National nature reserves in the United Kingdom see:*National Nature Reserves in England*National Nature Reserves in Northern Ireland*National Nature Reserves in Scotland*National Nature Reserves in Wales...

.

In 1986 the islands became the first place in Scotland to be inscribed as a UNESCO
UNESCO
The United Nations Educational, Scientific and Cultural Organization is a specialized agency of the United Nations...

 World Heritage Site
World Heritage Site
A UNESCO World Heritage Site is a place that is listed by the UNESCO as of special cultural or physical significance...

, for its terrestrial natural features. In 2004, St Kilda achieved a joint 'marine' status for its superlative natural features, its habitats for rare and endangered species, and its internationally important population of seabirds. By 2005 St Kilda thus became one of only two dozen global locations to be awarded World Heritage Status for both 'natural' and 'cultural' significance. The islands share this honour with internationally important sites such as Machu Picchu
Machu Picchu
Machu Picchu is a pre-Columbian 15th-century Inca site located above sea level. It is situated on a mountain ridge above the Urubamba Valley in Peru, which is northwest of Cusco and through which the Urubamba River flows. Most archaeologists believe that Machu Picchu was built as an estate for...

 in Peru
Peru
Peru , officially the Republic of Peru , is a country in western South America. It is bordered on the north by Ecuador and Colombia, on the east by Brazil, on the southeast by Bolivia, on the south by Chile, and on the west by the Pacific Ocean....

, Mount Athos
Mount Athos
Mount Athos is a mountain and peninsula in Macedonia, Greece. A World Heritage Site, it is home to 20 Eastern Orthodox monasteries and forms a self-governed monastic state within the sovereignty of the Hellenic Republic. Spiritually, Mount Athos comes under the direct jurisdiction of the...

 in Greece
Greece
Greece , officially the Hellenic Republic , and historically Hellas or the Republic of Greece in English, is a country in southeastern Europe....

 and the Ukhahlamba/Drakensberg Park
Drakensberg
The Drakensberg is the highest mountain range in Southern Africa, rising to in height. In Zulu, it is referred to as uKhahlamba , and in Sesotho as Maluti...

 in South Africa
South Africa
The Republic of South Africa is a country in southern Africa. Located at the southern tip of Africa, it is divided into nine provinces, with of coastline on the Atlantic and Indian oceans...

.

The St Kilda World Heritage Site
World Heritage Site
A UNESCO World Heritage Site is a place that is listed by the UNESCO as of special cultural or physical significance...

 covers a total area of 24,201.4 hectares (93.4 sq mi) including the land and sea. The land area is 854.6 hectares (2,111.8 acres).

St Kilda is a Scheduled Ancient Monument, a National Scenic Area
National Scenic Area
National Scenic Area is a designation for areas of natural beauty used by more than one nation.* National Scenic Area * National Scenic Area * National scenic areas in Taiwan* National Scenic Area...

, a Site of Special Scientific Interest
Site of Special Scientific Interest
A Site of Special Scientific Interest is a conservation designation denoting a protected area in the United Kingdom. SSSIs are the basic building block of site-based nature conservation legislation and most other legal nature/geological conservation designations in Great Britain are based upon...

, and a European Union Special Protection Area
Special Protection Area
A Special Protection Area or SPA is a designation under the European Union Directive on the Conservation of Wild Birds.Under the Directive, Member States of the European Union have a duty to safeguard the habitats of migratory birds and certain particularly threatened birds.Together with Special...

. Visiting yachts may find shelter in Village Bay, but those wishing to land are told to contact the National Trust for Scotland in advance. Concern exists about the introduction of non-native animal and plant species into such a fragile environment.

St Kilda's marine environment of underwater caves, arches and chasms offers a challenging but superlative diving experience. Such is the power of the North Atlantic swell that the effects of the waves can be detected 70 metres (230 ft) below sea level. In 2008 the National Trust for Scotland received the support of Scotland ’s Minister for Environment
Minister for Environment
The Minister for Environment and Climate Change is a Junior ministerial post in the Scottish Government. As a result, the minister does not attend the Scottish Cabinet unless his / her Cabinet Secretary is absent...

, Michael Russell for their plan to ensure no rats come ashore from The Spinningdale, a Spanish fishing vessel grounded on Hirta. There was concern that bird life on the island could be seriously affected. Fortunately, potential contaminants from the vessel including fuel, oils, bait and stores were successfully removed by Dutch salvage company Mammoet
Mammoet
Mammoet is a privately held Dutch company specializing in the hoisting and transporting of heavy objects.- History :Mammoet was founded in 1973, specialised in heavy transport over water and roads. In 2001 it was taken over by Van Seumeren transport. The name Mammoet became the name for the new...

 before the bird breeding season in early April.

See also

  • Fauna of Scotland
    Fauna of Scotland
    The fauna of Scotland is generally typical of the northwest European part of the Palearctic ecozone, although several of the country's larger mammals were hunted to extinction in historic times and human activity has also led to various species of wildlife being introduced...

  • Geology of Scotland
    Geology of Scotland
    The geology of Scotland is unusually varied for a country of its size, with a large number of differing geological features. There are three main geographical sub-divisions: the Highlands and Islands is a diverse area which lies to the north and west of the Highland Boundary Fault; the Central...

  • List of islands of Scotland
  • Outer Hebrides
    Outer Hebrides
    The Outer Hebrides also known as the Western Isles and the Long Island, is an island chain off the west coast of Scotland. The islands are geographically contiguous with Comhairle nan Eilean Siar, one of the 32 unitary council areas of Scotland...

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