(1992) Tetraogallus tibetanus aquilonifer.
THE SIKKIM SNOW-COOK.
Tetraogallus tibetanus aquilonifer Meinertz., Bull. B. O. C, xlvi, p. 99 (1926) (Interior of Sikkim).
Vernacular names. None recorded.
Description. Differs from the two preceding races in being darker and less sandy or fulvous on the head, nape and back. It is apparently extremely close to T. t. przewalskii, differing only in having the buff collar on the upper back more developed. In T. t. przewalskii this collar is less pronounced and is " strongly powdered with dark grey."
Colours of soft parts and Measurements the same as in the other races.
Distribution. "Alpine Sikkim and South Tibet" (Meinertzhagen). South Tibet" possibly means only that portion of Tibet immediately adjoining Sikkim. Birds from the Gyantse plateau in South Tibet, from Phari, Yatung on the West of that plateau and from the Abor Hills are centralis.
Habits. Meinertzhagen met with this Snow-Cock on the " Tibetan plateau country in Northern Sikkim at Gyagong (15,500-16,700 feet) and near Thangu (15,700 feet) in November."" Stevens never came across it but St. John Hickley shot specimens at 15,000 feet in June and in a letter to me says that they were evidently breeding, though he failed to find the nest. He adds that they were very good eating.