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{{short description|Genus of birds}}
{{Use mdy dates|date=January 2013}}
{{Automatic Taxobox
| name = Peacock-pheasants
| image = Stavenn Polyplectron napoleonis 01.jpg
| image_caption = male [[Palawan peacock-pheasant]]<br/>''Polyplectron napoleonis''
| taxon = Polyplectron
| authority = [[Coenraad Jacob Temminck|Temminck]], 1807
| synonyms =
''Polyplectrum'' (''lapsus'')
}}

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 their shapes using specialised plumage that when expanded reveals numerous iridescent orbs. The birds also vibrate their plume quills further accentuating their [[aposematism]]. Peacock-pheasants exhibit well developed metatarsal spurs. Older individuals may have multiple spurs on each leg. These kicking thorns are used in self-defense.

The systematics of the genus are somewhat unclear. Molecular research has revealed that peacock-pheasants are not genetically related to [[pheasant]]s and only distantly to [[peafowl]]. Their closest allies are the Asiatic [[Galloperdix|spurfowl]] and the [[crimson-headed partridge]], endemic to [[Borneo]]. These three genera share the curious tendency for multiple metatarsal spurs. Though they are somewhat divergent morphologically, their skeletons are nearly identical.

The species of ''Polyplectron'' diverged at some time between, roughly, the [[Early Pliocene]] and the [[Middle Pleistocene]], or 5–1 [[mya (unit)|million years ago]]. ''Polyplectron malacense'' and ''P. schleiermacheri'' form a [[Basal (phylogenetics)|basal]] radiation around the southern [[South China Sea]] together with ''P. napoleonis'', as is confirmed by comparison of [[biogeography]] and [[mtDNA]] [[cytochrome b|cytochrome ''b'']] and [[D-loop]] as well as the [[nuclear DNA|nuclear]] [[ovomucoid]] [[intron]] G.<ref name=Kimball>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. ''[[Biological Journal of the Linnean Society|Biol. J. Linn. Soc.]]'' '''73'''(2): 187–198. [http://www.ingentaconnect.com/content/els/00244066/2001/00000073/00000002/art90536 HTML abstract]</ref>

The relationships of the other forms are more poorly understood. ''P. germaini'' and ''P. bicalcaratum'' are similar in [[morphology (biology)|morphology]] and are nearly [[parapatric]]; the molecular data suggests that the latter is a [[symplesiomorphy]]. It would appear that ''P. germaini'' and ''P. katsumatae'' represent an early offshoot of the aforementioned basal radiation. The two montane-adapted species ''P. chalcurum'' and ''P. inopinatum'' are not derived from a single isolation event, and appear to have acquired more subdued coloration independently. A trend in this genus to ''lose''—not gain—pronounced [[sexual dimorphism]] is better supported by biogeographical and molecular data than the alternate scenario.<ref name=Kimball/>

In 2010 the [[IOC World Bird List]] listed the [[Hainan peacock-pheasant]] as a species.<ref name="worldbirdnames.org">[http://www.worldbirdnames.org/updates-PS.html ] {{webarchive |url=https://web.archive.org/web/20090729080733/http://www.worldbirdnames.org/updates-PS.html |date=July 29, 2009 }}</ref> Following [[Jean Théodore Delacour]], this species has historically been listed as a [[subspecies]] of ''P. bicalcaratum''. Prior to reclassification by Delacour, the Hainan peacock-pheasant has been considered a distinct species by several ornithologists. Indeed, when it was first described to science by Katsumata it was considered a distinct species. Prominent organizations including the World Bird List have recently concurred, and species status is currently under review by the [[Oriental Bird Club]].<ref>{{cite web |url=http://orientalbirdimages.org/new-obc-checklist-commentary.html |title=OBC Checklist |publisher=Orientalbirdimages.org |accessdate=January 16, 2013 |url-status=dead |archiveurl=https://web.archive.org/web/20121015234357/http://orientalbirdimages.org/new-obc-checklist-commentary.html |archivedate=October 15, 2012 |df=mdy-all }}</ref> It is considered of utmost importance to have the Hainan peacock-pheasant recognized as a full species due to its [[endangered]] status. The Hainan peacock-pheasant is endemic to the island of [[Hainan]], where its [[population density]] is very low in its [[tropical forest]] habitat on the island and the wild population is declining, making it now severely endangered and among the rarest species in the order [[Galliformes]] in [[China]].


==Species==
==Species==

Revision as of 19:09, 19 November 2019

Hello, I’m a pekock show! I eat pheasants and kill innocent chicks ha ha ha

Species

Image Name Common name Distribution
Polyplectron napoleonis – formerly P. emphanum Palawan peacock-pheasant Philippines
Polyplectron malacense Malayan peacock-pheasant Malay Peninsula from the Isthmus of Kra region southwards
Polyplectron schleiermacheri Bornean peacock-pheasant Borneo
Polyplectron germaini Germain's peacock-pheasant mid-southern Vietnam and far eastern Cambodia
Polyplectron bicalcaratum Grey peacock-pheasant Bangladesh, Northeast India and Southeast Asia
Polyplectron katsumatae – split from P. bicalcaratum[1] Hainan peacock-pheasant Hainan, China.
Polyplectron chalcurum Bronze-tailed peacock-pheasant Indonesia
Polyplectron inopinatum Mountain peacock-pheasant Malaysia.

References

  1. ^ Cite error: The named reference worldbirdnames.org was invoked but never defined (see the help page).