Mexican wolves are a subspecies of grey wolves and the most endangered wolf in the world. They are native to North America. They are being reintroduce to the wild through breeding programs. Males are taller and generally heavier than females weighing between sixty and eighty pounds and a height of twenty six to thirty two inches at the shoulder. Their diet includes such large hoofed mammals as white-tailed deer, mule deer, elk and smaller mammals including rabbits and mice. Mating season is mid February through mid March with a gestation period of sixty three days. There are usually four to seven pups in a litter. Pups are born blind and mature at around ten months of age.