In connexion with this point it should be noticed that, unlike what occurs in the yak, the wild animal is not larger than the tame one, although it is incorrect to say that the former is decidedly the inferior of the latter in point of stature.
The horned cattle include the humped oxen and buffaloes of India, and the yak of Tibet.
A hybrid between the yak and Indian cattle, called zo, is commonly reared in Tibet and the Himalaya.
YAK, the wild (and domesticated) ox of the Tibetan plateau; a species nearly allied to the bison group. The yak, Bos (POephagus) grunniens, is one of the finest and largest of the wild oxen, characterized by the growth of long shaggy hair on the flanks and under parts of the body and the well-known bushy tail.
But even these are inferior to the wild yak, which stands nearly 6 ft.
Yak have the great disadvantage that they will not eat corn, and the large pure-bred animals will not live at low elevations.
Here are to be found yak, wild asses (kyang), several varieties of deer, musk deer and Tibetan antelope (Pantholops); also wild sheep (the bharal of the Himalaya), Ovis hodgsoni and possibly Ovis poli, together with wild goats, bears (in large numbers in the north-eastern districts), leopards, otter, wolves, wild cats, foxes, marmots, squirrels, monkeys and wild dogs.
The yak of Thibet cannot long survive in the plains ofIndia, or even on the hills below a certain altitude; and that this is due to climate, and not to the increased density of the atmosphere, is shown by the fact that the same animal appears to thrive well in Europe, and even breeds there readily.
The fauna of the Tibetan Himalaya is essentially European or rather that of the northern half of the old continent, which region has by zoologists been termed Palaearctic. Among the characteristic animals may be named the yak, from which is reared a cross breed with the ordinary horned cattle of India, many wild sheep, and two antelopes, as well as the musk-deer; several hares and some burrowing animals, including pikas (Lagomys) and two or three species of marmot; certain arctic forms of carnivora - fox, wolf, lynx, ounce, marten and ermine; also wild asses.
Heinsii), we find one moufflon (Musimon vignei), formerly known only in the Himalayas, the Chinese antelope (Antilope subgutturosa) and the saiga antelope in the steppe's, the Siberian ibex and another goat, the yak, the zebu or Indian ox, the common ox, the camel and the dromedary.
In the higher mountainous parts animal life is more abundant, the typical forms being the wild yak, the kulan or wild ass, the arkhari or wild sheep, the orongo and other antelopes, the marmot, wolf, hare partridge and bear.
Very close to this group, if indeed really separable, is the Tibetan yak, forming by itself the sub-genus Poephagus.
Large oxen also occur in the Lower Pliocene of India, although not closely allied to the living kinds; while in the same formation are found remains of bison (or [?] yak) and buffaloes, some of the latter being nearly akin to the anoa, although much larger.