Abert’s Squirrel (Sciurus aberti)
Abert’s squirrel can be found in ponderosa pine forests across the four corners region of Arizona, New Mexico, Utah, and Colorado. In 1941, the Arizona Game and Fish Department successfully introduced Abert's squirrel as a game species from northern Arizona into the Santa Catalina Mountains. By 1959, Abert’s squirrel had spread into the Rincon Mountains of the park. Now this squirrel is the most common tree squirrel in the Rincons, outcompeting the native Arizona gray squirrels, whose numbers are declining.