Inachis io
Encyclopedia
The European Peacock more commonly known simply as the Peacock butterfly, is a colourful butterfly
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...

, found in 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...

, temperate Asia
Asia
Asia is the world's largest and most populous continent, located primarily in the eastern and northern hemispheres. It covers 8.7% of the Earth's total surface area and with approximately 3.879 billion people, it hosts 60% of the world's current human population...

 as far east as Japan
Japan
Japan is an island nation in East Asia. Located in the Pacific Ocean, it lies to the east of the Sea of Japan, China, North Korea, South Korea and Russia, stretching from the Sea of Okhotsk in the north to the East China Sea and Taiwan in the south...

. It is the only member of the genus
Genus
In biology, a genus is a low-level taxonomic rank used in the biological classification of living and fossil organisms, which is an example of definition by genus and differentia...

 Inachis (the name is derived from Greek mythology, meaning Io
Io (mythology)
Io was, in Greek mythology, a priestess of Hera in Argos, a nymph who was seduced by Zeus, who changed her into a heifer to escape detection. His wife Hera set ever-watchful Argus Panoptes to guard her, but Hermes was sent to distract the guardian and slay him...

, [the daughter] of Inachus
Inachus
In Greek mythology, Inachus was a king of Argos after whom a river was called Inachus River, the modern Panitsa that drains the western margin of the Argive plain...

). It should not be confused or classified with the "American peacocks" in the genus Anartia
Anartia
Anartia is a genus of butterflies in family Nymphalidae, and subfamily Nymphalinae, found in tropical and subtropical areas in the Americas...

; these are not close relatives of the present species. The Peacock butterfly is resident in much of its range, often wintering in buildings or trees. It therefore often appears quite early in spring. The Peacock butterfly has figured in research where the role of eye-spots as anti-predator mechanism has been investigated.

In the British Isles, the butterfly is found in England
England
England is a country that is part of the United Kingdom. It shares land borders with Scotland to the north and Wales to the west; the Irish Sea is to the north west, the Celtic Sea to the south west, with the North Sea to the east and the English Channel to the south separating it from continental...

, 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...

 (including Orkney and Shetland), Wales
Wales
Wales is a country that is part of the United Kingdom and the island of Great Britain, bordered by England to its east and the Atlantic Ocean and Irish Sea to its west. It has a population of three million, and a total area of 20,779 km²...

 and 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...

. The Peacock is expanding its range. The butterfly is not known to be threatened.

Characteristics

The butterfly has a wingspan of 50 to 55 mm. The base-colour of the wings is a rusty red, and at each wingtip it bears a distinctive, black, blue and yellow eye-spot
Eyespot (mimicry)
An eyespot is an eye-like marking. They are found on butterflies, reptiles, birds and fish. In members of the Felidae family , the white circular markings on the backs of the ears are termed ocelli, and they are functionally similar to eyespots in other animals.Eyespots may be a form of...

. The underside is a cryptically coloured dark-brown or black.
There are two subspecies
Subspecies
Subspecies in biological classification, is either a taxonomic rank subordinate to species, ora taxonomic unit in that rank . A subspecies cannot be recognized in isolation: a species will either be recognized as having no subspecies at all or two or more, never just one...

, I. io caucasica (Jachontov
Alexander Alexandrovi Jachontov
Alexander Alexandrovich Jachontov was a Russian entomologist who specialized in LepidopteraJachontov described many new taxa mostly at the subspecies level and wrote biogeographic works notably on the Rhopalocera of Gouvernements Vladimir and Nizhny Novgorod and those of the Caucasus.He wrote...

, 1912) found in Azerbaijan
Azerbaijan
Azerbaijan , officially the Republic of Azerbaijan is the largest country in the Caucasus region of Eurasia. Located at the crossroads of Western Asia and Eastern Europe, it is bounded by the Caspian Sea to the east, Russia to the north, Georgia to the northwest, Armenia to the west, and Iran to...

 and I. io geisha (Stichel
Frédéric Jules Sichel
Frédéric Jules Sichel was a French physician and entomologist.Sichel was born Frankfurt am Main.After his initial studies he went to live in Paris in 1829 where he opened the first ophthalmic clinic in 1832 and is credited with bringing modern ophthalmology to France from Austria and Germany...

 , 1908) found in Japan and the Russian Far East
Russian Far East
Russian Far East is a term that refers to the Russian part of the Far East, i.e., extreme east parts of Russia, between Lake Baikal in Eastern Siberia and the Pacific Ocean...

.

Natural history

The Peacock can be found in woods, fields, meadows, pastures, parks, and gardens, and from lowlands up to 2500 metres (8,202.1 ft) elevation. It is a relatively common butterfly seen in many European parks and gardens. The Peacock male exhibits territorial behaviour, in many cases territories being selected en route of the females to oviposition sites.

The butterfly hibernates
Hibernation
Hibernation is a state of inactivity and metabolic depression in animals, characterized by lower body temperature, slower breathing, and lower metabolic rate. Hibernating animals conserve food, especially during winter when food supplies are limited, tapping energy reserves, body fat, at a slow rate...

 over winter before laying its eggs in early spring, in batches of up to 400 at a time. The eggs are ribbed and olive-green in colour and laid on the upper parts, and, the undersides of leaves of nettle
Nettle
Nettles constitute between 24 and 39 species of flowering plants of the genus Urtica in the family Urticaceae, with a cosmopolitan though mainly temperate distribution. They are mostly herbaceous perennial plants, but some are annual and a few are shrubby...

 plants and hop
Hop (plant)
Humulus, Hop, is a small genus of flowering plants native to temperate regions of the Northern Hemisphere. The female flowers of H. lupulus are known as hops, and are used as a culinary flavoring and stabilizer, especially in the brewing of beer...

s. The caterpillar
Caterpillar
Caterpillars are the larval form of members of the order Lepidoptera . They are mostly herbivorous in food habit, although some species are insectivorous. Caterpillars are voracious feeders and many of them are considered to be pests in agriculture...

s, which are shiny black with six rows of barbed spikes and a series of white dots on each segment, and which have a shiny black head, hatch after about a week. The Chrysalis may be either grey, brown or green in colour and may have a blackish tinge. The caterpillar
Caterpillar
Caterpillars are the larval form of members of the order Lepidoptera . They are mostly herbivorous in food habit, although some species are insectivorous. Caterpillars are voracious feeders and many of them are considered to be pests in agriculture...

s grow up to 42 mm in length.

The recorded foodplants of the European Peacock are Stinging Nettle
Stinging nettle
Stinging nettle or common nettle, Urtica dioica, is a herbaceous perennial flowering plant, native to Europe, Asia, northern Africa, and North America, and is the best-known member of the nettle genus Urtica...

 (Urtica dioica), Hop
Hop (plant)
Humulus, Hop, is a small genus of flowering plants native to temperate regions of the Northern Hemisphere. The female flowers of H. lupulus are known as hops, and are used as a culinary flavoring and stabilizer, especially in the brewing of beer...

 (Humulus lupulus) and the Small Nettle (Urtica urens
Urtica urens
Urtica urens, commonly known as Annual Nettle, Dwarf Nettle or Small Nettle, is a herbaceous annual plant species of the genus Urtica. It is native to Eurasia and it can be found in North America and New Zealand as an introduced species...

).

The adult butterflies drink nectar from a wide variety of flowering plants, including buddleia, willow
Willow
Willows, sallows, and osiers form the genus Salix, around 400 species of deciduous trees and shrubs, found primarily on moist soils in cold and temperate regions of the Northern Hemisphere...

s, dandelions, wild marjoram
Marjoram
Marjoram is a somewhat cold-sensitive perennial herb or undershrub with sweet pine and citrus flavours...

, danewort
Danewort
Danewort , also known as Dane Weed, Danesblood, Dwarf Elder or European Dwarf Elder and Walewort is a herbaceous species of elder, native to southern and central Europe and southwest Asia. It grows to 1-2 m tall, with erect, usually unbranched stems growing in large groups from an extensive...

, hemp agrimony, and clover
Clover
Clover , or trefoil, is a genus of about 300 species of plants in the leguminous pea family Fabaceae. The genus has a cosmopolitan distribution; the highest diversity is found in the temperate Northern Hemisphere, but many species also occur in South America and Africa, including at high altitudes...

; they also utilize tree sap and rotten fruit.

The butterfly has cryptic undersides with flashy eye-spots above and can also make an audible sound by rubbing its wings together, presumably as anti-predator measures.

Etymology

Io
Io (mythology)
Io was, in Greek mythology, a priestess of Hera in Argos, a nymph who was seduced by Zeus, who changed her into a heifer to escape detection. His wife Hera set ever-watchful Argus Panoptes to guard her, but Hermes was sent to distract the guardian and slay him...

  is a figure in Greek mythology She was a priestess of Hera in Argos.

External links

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