General Information: Desert Mule Deer (Odocoileus hemionus crooki) are deer of the western mountains. In this subspecies (Arizona from the south side of the Grand Canyon (east of the Colorado River) eastward to western Texas and south into Mexico), the rump and tail are white. Gray-brown color is typical of the winter pelt.

Taxonomy: Order: Artiodactyla (Even-toed Hoofed Mammals); Family: Cervidae (Deer, Elk, Moose, Caribou).

There are 11 subspecies of mule deer. In most cases, the subspecies are difficult to tell apart (except by geography). However, there are obvious differences in the tails of some subspecies: some have black tails, some have white tails, and some have white tails with a black tip.

Technical Description: Height about 3 feet. Antlers (males only) are forked, each fork being equal in size (compare with White-tailed Deer). Coat color tends to be reddish in the spring and gray in the winter. The hooves are in pairs; one pair primarily contacts the ground, and another usually remains slightly off the ground behind the first.

Breeding: Deer breed in the fall (fall rut) and produce 1-2 young (fawns) in the spring.

Diet: Vegetation; browse on shrubs and twigs.

Range: Occur from Arizona (from the south side of the Grand Canyon) eastward to west Texas and south into Mexico.