Gray wolves (Canis lupus) migrated to North America from eastern Siberia across the Bering land bridge during the Ice Age. Mexican gray wolves (Canis lupus baileyi) evolved in the Southwest as gray wolves dispersed from north to south across North America. They were a part of the natural landscape when humans first arrived over 10,000 years ago. They roamed in suitable habitats throughout southeastern Arizona, southern New Mexico, western Texas, and northern Mexico from around the present-day location of Interstate 40 south to near Mexico City.
Range Maps
U.S. Fish and Wildlife Service Blue Range Wolf Recovery Area
Arizona Game and Fish Department Quarterly Location Map