Diablo is a male Mexican gray wolf that was born at the Detroit Zoological Institute in 2000. In 2004, Diablo and his brother Lorenzo became permanent residents at Wolf Haven as part of the Mexican gray wolf Species Survival Plan program. He is easy to identify because of a notch cut out of the tips of both ears from a dominance dispute as a young wolf. Diablo shares an enclosure on the public visitor route with Gypsy.