Red-tailed hawks can be seen flying over the refuge and a small number of bald eagles winter on the refuge. In addition to the abundant bird life, 30 species of mammals, 8 species of amphibians, and 10 species of reptiles occur here. The largest remaining population of the endangered Fender's blue butterfly is found on the refuge.
Red-tailed hawks can be observed soaring over the refuge, and a small number of bald eagles winter on the refuge. Additionally, numerous bird species, including 30 mammal species, 8 amphibian species, and 10 reptile species, are found here. The refuge also houses the largest remaining population of the endangered Fender's blue butterfly.