The Mountain Goat, Oreamnos americanus, often confused with white wild sheep. Wild sheep and mountain goats (Oreamnos americanus) are close cousins, both belonging to the Family Bovidae, but they are distinctly different species. To the inexperienced eye, female sheep, especially Dall sheep, may be confused with mountain goats. The most obvious differences between wild sheep and goats are hair color, horn color and structure, and hair length. Mountain goats are creamy-white or yellowish-white, never tan, brown or gray. Both sexes of goats have black horns. When compared to the horns of sheep, their horns are thinner, sharper and swept backward, but not curling.