A captive Mexican Wolf (Canis lupus baileyi) at the Sevilleta National Wildlife Refuge, New Mexico, USA. This critically endangered subspecies of the Gray Wolf once ranged from central Mexico to the Southwestern United States. In 1980, the last five known surviving members were captured to save the species. Now, over 300 wolves are taking part in a wolf reintroduction program, with at least fifty individuals in the wild.
Photo credit: Jim Clark, USFWS