Eastern Cougar Now Extinct, U.S. Officials Say | Live Science
Puma | Saint Louis Zoo
Puma: Habitat, Physical Description, Diet, Conservation – Philadelphia Zoo
The eastern puma is declared officially extinct | Daily Mail Online
Local Mountain Lion Population Faces Precipitous Decline in Genetic Diversity Within 50 Years, Possible Extinction - Santa Monica Mountains National Recreation Area (U.S. National Park Service)