No sharp line divides the groups, but a continuum varies from the serows at one end of the spectrum to sheep, true goats, and musk oxen at the other. ![]() They tend to be larger, highly social, and rather than mark territory with scent glands, they have highly evolved dominance behaviours. ![]() The grazers (sometimes collectively known as tsoan caprids, from the Hebrew tso'n meaning sheep and goats) evolved more recently. The resource-defenders are the more primitive group: they tend to be smaller in size, dark in colour, males and females fairly alike, have long, tessellated ears, long manes, and dagger-shaped horns. The lifestyles of caprids fall into two broad classes: 'resource-defenders', which are territorial and defend a small, food-rich area against other members of the same species and 'grazers', which gather together into herds and roam freely over a larger, usually relatively infertile area. Musk oxen in captivity have reached over 650 kg (1,430 lb). Members of the group vary considerably in size, from just over 1 m (3 ft) long for a full-grown grey goral ( Nemorhaedus goral), to almost 2.5 m (8 ft 2 in) long for a musk ox, and from under 30 kg (66 lb) to more than 350 kg (770 lb).
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