Coyotes found in low deserts and valleys weigh about 20 pounds, less than half of their mountain kin, who can weigh up to 50 pounds. Desert Coyotes are light gray or tan with a black tip on the tail.
Coyotes of high elevations have fur that is darker, thicker and longer; the under parts are nearly white, with some specimens having a white tip on the tail. In winter the coats of mountain coyotes become long and silky, and trappers hunt them for their fur.
text by: Lynn Burke
taken from: http://www.desertusa.com/june96/du_cycot.html