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name applied to any of a large number of hoofed, ruminant mammals of the cattle family (Bovidae), which also includes the bison, buffalo, sheep, and goats. Found in Africa and Eurasia, they range in size from pygmy antelopes, 12 in.
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(Pantholops hodgsoni), also the orongo, an artiodactylous mammal of the family Cavicornia. The chiru is about 80 cm high at the shoulder and weighs 40–50 kg. The back is grayish brown, and the abdomen white; in males, the head and front legs are dark. The nose is quite broad. The horns, carried only by the males, are up to 70 cm long, slightly curved, and almost vertical. The ears are short and pointed, and the tail is short. Chirus inhabit alpine regions in Tibet and Ladakh. They usually live in groups of four or five individuals. The mammals feed on grass. Chirus mate in November or December; the young are born in May or June.