Canis lupus baileyi, the Mexican gray wolf, is back in the Madrean Sky Islands of Mexico. The last wild Mexican gray wolves were captured from the Sierra Madre in 1980 in an attempt to preserve this southwestern sub-species, which once was common and roamed from Colorado to central Mexico and over much of Arizona, New Mexico, and Texas.
On Oct. 11th, 2011 5 wolves (2 males and three females) were released in the Sierra San Luis in far northeast Sonora. See more photos from this release here. Participants include Semarnat, Conanp, Conafor, Naturalia, state governments, and academics.