|Bighorn Sheep (Ovis canadensis)|
Wt. up to about 300 lbs (140 kg) in males and up to about 200 lbs (90
kg) in females. Overall tan to brown with a conspicuous white rump patch.
Males have large, curled horns whereas females
have smaller horns that do not curl back under eyes like those in males.
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Horns are permanent (not shed) and have a bony core and keratin sheath and are not forked. Both sexes have horns. North American species with horns include sheep (bighorn and Dall's), mountain goats, muskoxen, and bison. Antlers are shed annually and are composed totally of bone and are forked. Only males have antlers (except in caribou)(Why do you think this is? North American species with antlers include members of the deer family (deer, moose, elk, caribou). Pronghorns have a bony core (permanent) and a keratin sheath (shed annually) and are forked. Both sexes have pronghorns. Only the Pronghorn has pronghorns.