Wolves

Adapted from Webster's Concise Interactive Encyclopedia.

Any of two species of large wild dogs of the genus Canis. The gray or timber wolf Canis lupus, of North America and Eurasia, is highly social, measures up to 90 cm/3 ft at the shoulder, and weighs up to 45 kg/100 lb. It has been greatly reduced in numbers except for isolated wilderness regions.

The red wolf Canis niger, generally more slender and smaller (average weight about 15 kg/35 lb) and tawnier in color, may be extinct in the wild. It used to be restricted to S central US.