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Mexican gray wolves are part of a captive breeding program that is managed with the U.S. Fish & Wildlife Service by the Association of Zoos and Aquariums (AZA) under its Species Survival Plan (SSP) and the Mexican Technical Advisory Subcommittee for the Conservation of Mexican Wolves. Currently, there are 283 Mexican gray wolves in 52 institutions across the United States. The 2011 census recorded a minimum count of 57 individuals in the wild in New Mexico and Arizona, and in October 2011 five wolves were released for the first time in the Northern Mexican state of Sonora.
( Photo / Jim Schulz/Chicago Zoological Society)