BIGHORN SHEEP
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The bighorn sheep is a species of sheep native to North America named for its large horns. A pair of horns might weigh up to 14 kg (30 lb); the sheep weigh up to 140 kg (300 lb).
Bighorn sheep are named for the large, curved horns borne by the rams (males). Ewes (females) also have horns, but they are shorter with less curvature. They range in color from light brown to grayish or dark, chocolate brown, with a white rump and lining on the backs of all four legs.
Male bighorn sheep have large horn cores, enlarged cornual and frontal sinuses, and internal bony septa. These adaptations serve to protect the brain by absorbing the impact of clashes.
DIET
In summer, they subsist on grasses or sedges. In winter they eat more woody plants, such as willow, sage and rabbit brush. In desert bighorn sheep eat brushy plants such as desert holly and desert cactus.
LIFESPAN
Lifespan: Rams live 9-12 years, while ewes live 10-14 years.
