Black-billed Capercaillie (Tetrao urogalloides) [XC827957]
by id from Gorkhi Terelj National Park, Mongolia (?)
Black-billed Capercaillie (Tetrao urogalloides) [XC481560]
by Ding Li Yong from Erdenemandal, Arkhangai, Mongolia (mid canopy, single male lekking in tree)
Subspecies
Forms superspecies with Western Capercaillie (Tetrao urogallus), with which frequently hybridizes in the limited areas of overlap in basin of R Yenisey. Birds from various parts of Siberia formerly awarded subspecies turensis, janensis and kolymensis, and those from Transbaikalia macrurus.
The following 4 subspecies are recognised:
parvirostris Bonaparte, 1856 - Eastern Siberia, from lower R Yenisey to the upper R Anadyr, south to Transbaikalia, Manchuria, Ussuriland and Sikhote Alin Mts; Sakhalin I.