Phasianidae
Encyclopedia
The Phasianidae is a family
Family (biology)
In biological classification, family is* a taxonomic rank. Other well-known ranks are life, domain, kingdom, phylum, class, order, genus, and species, with family fitting between order and genus. As for the other well-known ranks, there is the option of an immediately lower rank, indicated by the...

 of bird
Bird
Birds are feathered, winged, bipedal, endothermic , egg-laying, vertebrate animals. Around 10,000 living species and 188 families makes them the most speciose class of tetrapod vertebrates. They inhabit ecosystems across the globe, from the Arctic to the Antarctic. Extant birds range in size from...

s which consists of the pheasant
Pheasant
Pheasants refer to some members of the Phasianinae subfamily of Phasianidae in the order Galliformes.Pheasants are characterised by strong sexual dimorphism, males being highly ornate with bright colours and adornments such as wattles and long tails. Males are usually larger than females and have...

s and partridge
Partridge
Partridges are birds in the pheasant family, Phasianidae. They are a non-migratory Old World group.These are medium-sized birds, intermediate between the larger pheasants and the smaller quails. Partridges are native to Europe, Asia, Africa, and the Middle East...

s, including the junglefowl
Junglefowl
Junglefowl are the four living species of bird from the genus Gallus in the Gallinaceous bird order, which occur in India, Sri Lanka, Southeast Asia and Indonesia....

 (including chicken
Chicken
The chicken is a domesticated fowl, a subspecies of the Red Junglefowl. As one of the most common and widespread domestic animals, and with a population of more than 24 billion in 2003, there are more chickens in the world than any other species of bird...

), Old World Quail
Old World quail
Old World quail is a collective name for several genera of mid-sized birds in the pheasant family Phasianidae. New World quail are also found in the Galliformes, but are not in the same family . Buttonquails are not closely related at all, but are named for their similar appearance...

, francolin
Francolin
Francolins are birds that traditionally have been placed in the genus Francolinus, but now commonly are divided into multiple genera , although some of the major taxonomic listing sources have yet to divide them. They are members of the pheasant family, Phasianidae...

s, monal
Monal
A Monal is a bird of genus Lophophorus of the Pheasant family, Phasianidae. There are three species and several sub-species within the genus Lophophorus:* Himalayan Monal Lophophorus impejanus* Sclater's Monal Lophophorus sclateri...

s and peafowl
Peafowl
Peafowl are two Asiatic species of flying birds in the genus Pavo of the pheasant family, Phasianidae, best known for the male's extravagant eye-spotted tail, which it displays as part of courtship. The male is called a peacock, the female a peahen, and the offspring peachicks. The adult female...

. The family is a large one, and is occasionally broken up into two subfamilies, the Phasianinae
Phasianinae
Phasianinae refers to the subfamily of Phasianidae in the order Galliformes.They are characterised by strong sexual dimorphism, males being highly ornate with bright colours and adornments such as wattles and long tails. Males are usually larger than females and have longer tails. Males play no...

, and the Perdicinae
Perdicinae
The Perdicinae are birds in a subfamily in the pheasant family, the Phasianidae. They are a non-migratory Old World group.These are medium-sized birds, and are native to Europe, Asia, Africa, and the Middle East...

. Sometimes additional families and birds are treated as being in this family as well; the American Ornithologists' Union
American Ornithologists' Union
The American Ornithologists' Union is an ornithological organization in the USA. Unlike the National Audubon Society, its members are primarily professional ornithologists rather than amateur birders...

 includes Tetraonidae
Grouse
Grouse are a group of birds from the order Galliformes. They are sometimes considered a family Tetraonidae, though the American Ornithologists' Union and many others include grouse as a subfamily Tetraoninae in the family Phasianidae...

 (the grouse), Numididae
Guineafowl
The guineafowl are a family of birds in the Galliformes order, although some authorities include the guineafowl as a subfamily, Numidinae, of the family Phasianidae...

 (guineafowls), and Meleagrididae
Turkey (bird)
A turkey is a large bird in the genus Meleagris. One species, Meleagris gallopavo, commonly known as the Wild Turkey, is native to the forests of North America. The domestic turkey is a descendant of this species...

 (turkeys) in Phasianidae as subfamilies.

The earliest fossil records of phasianids date to the late Oligocene epoch, about 30 million years ago.

Distribution

The pheasants and their allies are an Old World family, with a distribution that includes most of Europe and Asia (except the far north), all of Africa
Africa
Africa is the world's second largest and second most populous continent, after Asia. At about 30.2 million km² including adjacent islands, it covers 6% of the Earth's total surface area and 20.4% of the total land area...

 except the driest deserts and down into much of eastern Australia
Australia
Australia , officially the Commonwealth of Australia, is a country in the Southern Hemisphere comprising the mainland of the Australian continent, the island of Tasmania, and numerous smaller islands in the Indian and Pacific Oceans. It is the world's sixth-largest country by total area...

 and (formerly) New Zealand
New Zealand
New Zealand is an island country in the south-western Pacific Ocean comprising two main landmasses and numerous smaller islands. The country is situated some east of Australia across the Tasman Sea, and roughly south of the Pacific island nations of New Caledonia, Fiji, and Tonga...

. The greatest diversity of species is in Southeast Asia and Africa. Amongst the pheasants, with the exception of the Congo Peafowl
Congo Peafowl
The Congo Peafowl is a species of peafowl. It is the only member of the monotypic genus Afropavo.The male is a large bird of up to in length. Its feathers are deep blue with a metallic green and violet tinge. It has bare red neck skin, grey feet, and a black tail with fourteen feathers...

, the distribution is entirely restricted to Asia; the Perdicinae
Perdicinae
The Perdicinae are birds in a subfamily in the pheasant family, the Phasianidae. They are a non-migratory Old World group.These are medium-sized birds, and are native to Europe, Asia, Africa, and the Middle East...

 have a much more widespread distribution. Within their range they occupy almost every available habitat except for boreal forest and tundra.

The family is generally sedentary and resident, although some quails undertake long migrations
Bird migration
Bird migration is the regular seasonal journey undertaken by many species of birds. Bird movements include those made in response to changes in food availability, habitat or weather. Sometimes, journeys are not termed "true migration" because they are irregular or in only one direction...

. Several species in the family have been widely introduced
Introduced species
An introduced species — or neozoon, alien, exotic, non-indigenous, or non-native species, or simply an introduction, is a species living outside its indigenous or native distributional range, and has arrived in an ecosystem or plant community by human activity, either deliberate or accidental...

 around the world, particularly pheasants which have been introduced to Europe, Australia and the Americas. Captive populations of peacocks and chickens have also escaped and become 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...

.

Description

Phasianids are terrestrial, ground living species. They are variable in size and ranging from 43 g, in the case of the King Quail, to 6 kg in the case of the Indian Peafowl
Indian Peafowl
The Indian Peafowl or Blue Peafowl is a large and brightly coloured bird of the pheasant family native to South Asia, but introduced and semi-feral in many other parts of the world...

. There is generally sexual dimorphism
Sexual dimorphism
Sexual dimorphism is a phenotypic difference between males and females of the same species. Examples of such differences include differences in morphology, ornamentation, and behavior.-Examples:-Ornamentation / coloration:...

 in size, with males tending to be larger than females. They are generally plump, with broad relatively short wing
Wing
A wing is an appendage with a surface that produces lift for flight or propulsion through the atmosphere, or through another gaseous or liquid fluid...

s and strong legs. Many have a spur
Spur
A spur is a metal tool designed to be worn in pairs on the heels of riding boots for the purpose of directing a horse to move forward or laterally while riding. It is usually used to refine the riding aids and to back up the natural aids . The spur is used in every equestrian discipline...

 on their leg
Leg
Łęg may refer to the following places in Poland:*A former name for the town of Ełk *Part of the Czyżyny district of Kraków*Łęg, Pleszew County in Greater Poland Voivodeship...

s, a feature shared with guineafowl and turkeys but no other galliform birds. The bill is short and generally strong, particularly in species that dig in order to obtain food. Males of the larger species
Species
In biology, a species is one of the basic units of biological classification and a taxonomic rank. A species is often defined as a group of organisms capable of interbreeding and producing fertile offspring. While in many cases this definition is adequate, more precise or differing measures are...

 often have brightly coloured plumage
Plumage
Plumage refers both to the layer of feathers that cover a bird and the pattern, colour, and arrangement of those feathers. The pattern and colours of plumage vary between species and subspecies and can also vary between different age classes, sexes, and season. Within species there can also be a...

 as well as facial ornamentations such as wattle
Wattle
Wattle may refer to:*Wattle , a fleshy growth hanging from the head or neck of certain animals.*Wattle is another term for Congenital cartilaginous rest of the neck...

s or crests.

Behaviour

The pheasants and partridges have a varied diet, with foods taken ranging from purely vegetarian diets of seeds, leaves, fruits, tubers and roots, to small animals including insects, insect grubs and even small reptiles. Most species either specialise in feeding on plant matter or are predatory, although the chicks of most species are insectivorous.

In addition to the variation in diet there is a considerable amount of variation in breeding strategies amongst the Phasianidae. Compared to birds in general there is a large number of species that do not engage in monogamy
Monogamy
Monogamy /Gr. μονός+γάμος - one+marriage/ a form of marriage in which an individual has only one spouse at any one time. In current usage monogamy often refers to having one sexual partner irrespective of marriage or reproduction...

 (the typical breeding system of most birds). The francolins of Africa and some partridges are reportedly monogamous, but polygamy has been reported in the pheasants and junglefowl, some quail, and the breeding displays of peacocks have been compared to those of a lek. Nesting usually occurs on the ground; only the tragopan
Tragopan
Tragopan is a genus of bird in the family Phasianidae. These birds are commonly called "horny pheasants" because of two brightly-colored, fleshy horns on their heads that they can erect during courtship displays...

s nest higher up in stumps of bushes. Nests can vary from monds of vegetation to slight scrapes in the ground. As many as 18 eggs can be laid in the nest, although 7-12 is the more usual number, with smaller numbers in tropical species. Incubation
Avian incubation
Incubation refers to the process by which certain oviparous animals hatch their eggs, and to the development of the embryo within the egg. The most vital factor of incubation is the constant temperature required for its development over a specific period. Especially in domestic fowl, the act of...

 is almost always performed by the female only, and last from 14–30 days depending on the species.

Relationship with humans

Several species of pheasant and partridge are extremely important to humans. The Red Junglefowl
Red Junglefowl
The Red Junglefowl is a tropical member of the Pheasant family. They are thought to be ancestors of the domestic chicken with some hybridisation with the Grey Junglefowl...

 of Southeast Asia is the wild ancestor of the domesticated chicken
Chicken
The chicken is a domesticated fowl, a subspecies of the Red Junglefowl. As one of the most common and widespread domestic animals, and with a population of more than 24 billion in 2003, there are more chickens in the world than any other species of bird...

, the most important bird in agriculture. Ring-necked Pheasants, several partridge and quail species and some francolins have been widely introduced and managed as game birds for hunting. Several species are threatened by human activities.

External links

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