The gray peacock-pheasant (''Polyplectron bicalcaratum''), also known as Burmese peacock-pheasant, is a large

Asia Asia (, ) is one of the world's most notable geographical regions, which is either considered a continent in its own right or a subcontinent of Eurasia, which shares the continental landmass of Afro-Eurasia with Africa. Asia covers an area ...

n member of the

order Order, ORDER or Orders may refer to: * Categorization, the process in which ideas and objects are recognized, differentiated, and understood * Heterarchy, a system of organization wherein the elements have the potential to be ranked a number of d ...

Galliformes Galliformes is an order of heavy-bodied ground-feeding birds that includes turkeys, chickens, quail, and other landfowl. Gallinaceous birds, as they are called, are important in their ecosystems as seed dispersers and predators, and are often ...

Taxonomy

In 1747 the English naturalist George Edwards included an illustration and a description of the grey peacock-pheasant in the second volume of his ''A Natural History of Uncommon Birds''. He used the English name "The Peacock Pheasant from China". Edwards based his hand-coloured etching on a live bird which was given to

Robert Walpole, 1st Earl of Orford Robert Walpole, 1st Earl of Orford, (26 August 1676 – 18 March 1745; known between 1725 and 1742 as Sir Robert Walpole) was a British statesman and Whig politician who, as First Lord of the Treasury, Chancellor of the Exchequer, and Leader ...

. When in 1758 the Swedish naturalist

Carl Linnaeus Carl Linnaeus (; 23 May 1707 – 10 January 1778), also known after his ennoblement in 1761 as Carl von Linné Blunt (2004), p. 171. (), was a Swedish botanist, zoologist, taxonomist, and physician who formalised binomial nomenclature, the ...

updated his ''

Systema Naturae ' (originally in Latin written ' with the ligature æ) is one of the major works of the Swedish botanist, zoologist and physician Carl Linnaeus (1707–1778) and introduced the Linnaean taxonomy. Although the system, now known as binomial nomen ...

'' for the tenth edition, he placed the grey peacock-pheasant with the

Indian peafowl The Indian peafowl (''Pavo cristatus''), also known as the common peafowl, and blue peafowl, is a peafowl species native to the Indian subcontinent. It has been introduced to many other countries. Male peafowl are referred to as peacocks, and ...

in the

genus Genus ( plural genera ) is a taxonomic rank used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In the hierarchy of biological classification, genus com ...

'' Pavo''. Linnaeus included a brief description, coined the

binomial name In taxonomy, binomial nomenclature ("two-term naming system"), also called nomenclature ("two-name naming system") or binary nomenclature, is a formal system of naming species of living things by giving each a name composed of two parts, bot ...

''Pavo bicalcaratum'' and cited Edwards' work. The grey peacock-pheasant is now placed in the

Polyplectron The peacock-pheasants are a bird genus, ''Polyplectron'', of the family Phasianidae, consisting of eight species. They are colored inconspicuously, relying on heavily on crypsis to avoid detection. When threatened, peacock-pheasants will alter t ...

'' that was introduced in 1807 by the Dutch zoologist

Coenraad Jacob Temminck Coenraad Jacob Temminck (; 31 March 1778 – 30 January 1858) was a Dutch people, Dutch Aristocracy (class), aristocrat, Zoology, zoologist and museum director. Biography Coenraad Jacob Temminck was born on 31 March 1778 in Amsterdam in the Dut ...

. The genus name ''Polyplectron'' combines the

Ancient Greek Ancient Greek includes the forms of the Greek language used in ancient Greece and the ancient world from around 1500 BC to 300 BC. It is often roughly divided into the following periods: Mycenaean Greek (), Dark Ages (), the Archaic peri ...

''polus'' meaning "many" with ''plēktron'' meaning "cock's spur". The specific epithet ''bicalcaratum'' combines the

Latin Latin (, or , ) is a classical language belonging to the Italic branch of the Indo-European languages. Latin was originally a dialect spoken in the lower Tiber area (then known as Latium) around present-day Rome, but through the power of the ...

''bi'' meaning "two" with ''calcar'', ''calcaris'' meaning "spur". Although several

subspecies In biological classification, subspecies is a rank below species, used for populations that live in different areas and vary in size, shape, or other physical characteristics (morphology), but that can successfully interbreed. Not all species ...

have been described, none are currently recognised in the list of world birds maintained by

Frank Gill Frank Gill may refer to: * Frank Gill (Australian footballer) (1908–1970), Australian rules footballer with Carlton * Frank Gill (footballer, born 1948), footballer for Tranmere Rovers *Frank Gill (politician) (1917–1982), New Zealand politicia ...

Pamela Rasmussen Pamela Cecile Rasmussen (born October 16, 1959) is an American ornithologist and expert on Asian birds. She was formerly a research associate at the Smithsonian Institution in Washington, D.C., and is based at the Michigan State University. She ...

and David Donsker on behalf of the

International Ornithological Committee The International Ornithologists' Union, formerly known as the International Ornithological Committee, is a group of about 200 international ornithologists, and is responsible for the International Ornithological Congress and other international ...

(IOC). Other

have been described in the past, but these are not now recognised: * ''P. b. ghigii'' Delacour & Jabouille, 1924 – Ghigi's grey peacock-pheasant * ''P. b. bailyi'' Lowe, 1925 – Lowe's grey peacock-pheasant (disputed) * ''P. b. bakeri'' Lowe, 1925 – Northern grey peacock-pheasant One previous subspecies, the

Hainan peacock-pheasant The Hainan peacock-pheasant (''Polyplectron katsumatae'') is an endangered bird that belongs to the pheasant family Phasianidae. This extremely rare species is endemic to the island of Hainan, China. Description The bird was long considered ...

(''P. b. katsumatae''), is now recognised as a separate species by the IOC. Lowe's grey peacock-pheasant was described from a captive bird of unknown provenance. Similar examples have turned up on occasion, but the validity and – if distinct – home range of this

taxon In biology, a taxon (back-formation from ''taxonomy''; plural taxa) is a group of one or more populations of an organism or organisms seen by taxonomists to form a unit. Although neither is required, a taxon is usually known by a particular nam ...

remains unknown. It was theorized to inhabit western

Assam Assam (; ) is a state in northeastern India, south of the eastern Himalayas along the Brahmaputra and Barak River valleys. Assam covers an area of . The state is bordered by Bhutan and Arunachal Pradesh to the north; Nagaland and Manipur ...

or the eastern

Himalayas The Himalayas, or Himalaya (; ; ), is a mountain range in Asia, separating the plains of the Indian subcontinent from the Tibetan Plateau. The range has some of the planet's highest peaks, including the very highest, Mount Everest. Over 100 ...

, but this is based on conjecture. The

phylogeny A phylogenetic tree (also phylogeny or evolutionary tree Felsenstein J. (2004). ''Inferring Phylogenies'' Sinauer Associates: Sunderland, MA.) is a branching diagram or a tree showing the evolutionary relationships among various biological spec ...

of this species is fairly enigmatic.

mtDNA Mitochondrial DNA (mtDNA or mDNA) is the DNA located in mitochondria, cellular organelles within eukaryotic cells that convert chemical energy from food into a form that cells can use, such as adenosine triphosphate (ATP). Mitochondrial DNA ...

cytochrome ''b'' and

D-loop In molecular biology, a displacement loop or D-loop is a DNA structure where the two strands of a double-stranded DNA molecule are separated for a stretch and held apart by a third strand of DNA. An R-loop is similar to a D-loop, but in this cas ...

as well as the

nuclear Nuclear may refer to: Physics Relating to the nucleus of the atom: * Nuclear engineering *Nuclear physics *Nuclear power *Nuclear reactor *Nuclear weapon *Nuclear medicine *Radiation therapy *Nuclear warfare Mathematics *Nuclear space *Nuclear ...

ovomucoid Ovomucoid is a protein found in egg whites. It is a trypsin inhibitor with three protein domains of the Kazal domain family. The homologs from chickens (''Gallus gallus'') and especially turkeys (''Meleagris gallopavo'') are best characterized ...

intron An intron is any nucleotide sequence within a gene that is not expressed or operative in the final RNA product. The word ''intron'' is derived from the term ''intragenic region'', i.e. a region inside a gene."The notion of the cistron .e., gene. ...

sequence In mathematics, a sequence is an enumerated collection of objects in which repetitions are allowed and order matters. Like a set, it contains members (also called ''elements'', or ''terms''). The number of elements (possibly infinite) is calle ...

data confirms that it belongs to a largely Continental Asian

clade A clade (), also known as a monophyletic group or natural group, is a group of organisms that are monophyletic – that is, composed of a common ancestor and all its lineal descendants – on a phylogenetic tree. Rather than the English term, ...

together with

Germain's peacock-pheasant Germain's peacock-pheasant (''Polyplectron germaini'') is a pheasant that is endemic to Indochina. The name commemorates the France, French colonial army's veterinary surgeon Louis Rodolphe Germain. Description The bird is a medium-sized, approx ...

(''P. germaini''), but also the "brown" southern species

bronze-tailed peacock-pheasant The bronze-tailed peacock-pheasant (''Polyplectron chalcurum'') is also known as the Sumatran peacock-pheasant. It is an Indonesian bird. Description The bronze-tailed peacock-pheasant is a small, up to 56 cm long, dark brown pheasant with ...

(''P. chalcurum'') and

mountain peacock-pheasant The mountain peacock-pheasant (''Polyplectron inopinatum''), also known as Rothschild's peacock-pheasant or mirror pheasant, is a medium-sized, up to 65 cm long, blackish brown pheasant with small ocelli and long graduated tail feathers. Bo ...

(''P. inopinatum'').Kimball ''et al.'' (2001) The ovomucin sequence seems to have evolved convergently or with a decreased

mutation In biology, a mutation is an alteration in the nucleic acid sequence of the genome of an organism, virus, or extrachromosomal DNA. Viral genomes contain either DNA or RNA. Mutations result from errors during DNA or viral replication, mi ...

al rate on the grey and the bronze-tailed peacock-pheasant. Though they are quite similar on the molecular level, the distance and interspersed populations of their closest relatives argue against a much more recently shared common ancestry between them versus the other two "northern" peacock-pheasants. Also, the cytochrome ''b'' and D-loop data does not support a closer relationship between ''P. bicalcaratus'' and ''P. chalcurum''; overall, as it seems the four species' ancestors separated during a very short timespan. Note however that in the absence of dedicated

phylogeographic Phylogeography is the study of the historical processes that may be responsible for the past to present geographic distributions of genealogical lineages. This is accomplished by considering the geographic distribution of individuals in light of ge ...

studies, the molecular data is only of limited value in this species, the most morphologically diverse and widespread

peacock-pheasant The peacock-pheasants are a bird genus, ''Polyplectron'', of the family Phasianidae, consisting of eight species. They are colored inconspicuously, relying on heavily on crypsis to avoid detection. When threatened, peacock-pheasants will alter t ...

: There is no data on the origin and number of specimens, but it is unlikely that more than one or two individuals – possibly of captive origin and undeterminable subspecific allocation – were sampled. All that can be reasonably assumed is that the grey peacock-pheasant

evolved Evolution is change in the heritable characteristics of biological populations over successive generations. These characteristics are the expressions of genes, which are passed on from parent to offspring during reproduction. Variation t ...

on mainland Southeast Asia, probably during the

Late Pliocene Late may refer to: * LATE, an acronym which could stand for: ** Limbic-predominant age-related TDP-43 encephalopathy, a proposed form of dementia ** Local-authority trading enterprise, a New Zealand business law ** Local average treatment effect, ...

Early Pleistocene The Early Pleistocene is an unofficial sub-epoch in the international geologic timescale in chronostratigraphy, being the earliest division of the Pleistocene Epoch within the ongoing Quaternary Period. It is currently estimated to span the time ...

3.6-1

million years ago The abbreviation Myr, "million years", is a unit of a quantity of (i.e. ) years, or 31.556926 teraseconds. Usage Myr (million years) is in common use in fields such as Earth science and cosmology. Myr is also used with Mya (million years ago). ...

Description

It is a large

pheasant Pheasants ( ) are birds of several genera within the family (biology), family Phasianidae in the order (biology), order Galliformes. Although they can be found all over the world in introduced (and captive) populations, the pheasant genera na ...

, up to 76 cm long and greyish brown with finely spotted green eyespots, an elongated bushy crest, bare pink or yellow facial skin, white throat, and grey

iris Iris most often refers to: *Iris (anatomy), part of the eye *Iris (mythology), a Greek goddess * ''Iris'' (plant), a genus of flowering plants *Iris (color), an ambiguous color term Iris or IRIS may also refer to: Arts and media Fictional enti ...

bill Bill(s) may refer to: Common meanings * Banknote, paper cash (especially in the United States) * Bill (law), a proposed law put before a legislature * Invoice, commercial document issued by a seller to a buyer * Bill, a bird or animal's beak Plac ...

and legs. The sexes are rather similar, but the female is smaller, darker and less ornamented than the male. The young resemble the female.

Distribution and habitat

The grey peacock-pheasant is distributed in lowland and hill forests of

Bangladesh Bangladesh (}, ), officially the People's Republic of Bangladesh, is a country in South Asia. It is the eighth-most populous country in the world, with a population exceeding 165 million people in an area of . Bangladesh is among the mos ...

Northeast India , native_name_lang = mni , settlement_type = , image_skyline = , image_alt = , image_caption = , motto = , image_map = Northeast india.png , ...

and

Southeast Asia Southeast Asia, also spelled South East Asia and South-East Asia, and also known as Southeastern Asia, South-eastern Asia or SEA, is the geographical United Nations geoscheme for Asia#South-eastern Asia, south-eastern region of Asia, consistin ...

, but excluding most of

Indochina Mainland Southeast Asia, also known as the Indochinese Peninsula or Indochina, is the continental portion of Southeast Asia. It lies east of the Indian subcontinent and south of Mainland China and is bordered by the Indian Ocean to the west an ...

as well as the entire

Malayan Peninsula The Malay Peninsula (Malay: ''Semenanjung Tanah Melayu'') is a peninsula in Mainland Southeast Asia. The landmass runs approximately north–south, and at its terminus, it is the southernmost point of the Asian continental mainland. The area ...

. The diet consists mainly of seeds, termites, fruits and invertebrates. The female usually lays two eggs.

Status and conservation

Widespread throughout its large range, the grey peacock-pheasant is evaluated as a Species of

Least Concern A least-concern species is a species that has been categorized by the International Union for Conservation of Nature (IUCN) as evaluated as not being a focus of species conservation because the specific species is still plentiful in the wild. T ...

on the

IUCN Red List The International Union for Conservation of Nature (IUCN) Red List of Threatened Species, also known as the IUCN Red List or Red Data Book, founded in 1964, is the world's most comprehensive inventory of the global conservation status of biol ...

of Threatened Species. It is listed on

CITES Appendix II CITES (shorter name for the Convention on International Trade in Endangered Species of Wild Fauna and Flora, also known as the Washington Convention) is a multilateral treaty to protect endangered plants and animals from the threats of interna ...

, restricting trade in wild-caught birds to preserve its stocks.BLI (2008)

References

* Kimball, Rebecca T.; Braun, Edward L.; Ligon, J. David; Lucchini, Vittorio & Randi, Ettore (2001): A molecular phylogeny of the peacock-pheasants (Galliformes: ''Polyplectron'' spp.) indicates loss and reduction of ornamental traits and display behaviours. '' Biol. J. Linn. Soc.'' 73(2): 187–198. PDF fulltext
* Lowe, Percy R. (1924): Some notes on the genus ''Polyplectron''. ''

Ibis The ibises () (collective plural ibis; classical plurals ibides and ibes) are a group of long-legged wading birds in the family Threskiornithidae, that inhabit wetlands, forests and plains. "Ibis" derives from the Latin and Ancient Greek word f ...

'' 67(2): 476–484.

External links

BirdLife Species Factsheet
{{Use dmy dates, date=March 2019

grey peacock-pheasant The gray peacock-pheasant (''Polyplectron bicalcaratum''), also known as Burmese peacock-pheasant, is a large Asian member of the order (biology), order Galliformes. Taxonomy In 1747 the English naturalist George Edwards (naturalist), George Ed ...

Birds of Bangladesh Birds of Bhutan Birds of Cambodia Birds of Northeast India Birds of Laos Birds of Myanmar Birds of Thailand Birds of Vietnam Birds of Yunnan