General Appearance and Characteristics
Both male and female mountain goats have beards, short tails, and long black horns, 15–28 centimetres (5.9–11 in) in length, which contain yearly growth rings. They are protected from the elements by their woolly white double coats. The fine, dense wool of their undercoats is covered by an outer layer of longer, hollow hairs. In spring, mountain goats moult by rubbing against rocks and trees, with the adult bucks (males) shedding their extra wool first and the pregnant does (females) shedding last. In the winter, their coats help them to withstand temperatures as low as −50 °F (−46 °C) and winds of up to 100 mph (160 km/h).
A buck stands about 1 m (3.3 ft) at the shoulder to the waist and can weigh considerably more than the female (around 30% more in some cases). Male goats also have longer horns and a longer beard than a female does. Mountain goats can weigh between 45 and 140 kg (99 and 310 lb), though even males will often weigh less than 82 kg (180 lb). The head-and-body length can range from 120–179 cm (47–70 in), with a small tail adding 10–20 cm (3.9–7.9 in).
The mountain goat's feet are well-suited for climbing steep, rocky slopes, sometimes with pitches of 60 degrees or more, with inner pads that provide traction and cloven hooves that can be spread apart as needed. Also, the tips of their feet have dewclaws that are sharp to keep them from slipping.
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