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)
Eastern cougar | extinct mammal | Britannica
Agency: Eastern puma extinct, drops protection
Puma: Habitat, Physical Description, Diet, Conservation – Philadelphia Zoo
Eastern puma declared extinct, 80 years after last confirmed sighting - The Wildlife Society
Extinct puma, cougar may never have existed in South Carolina
Eastern Cougar "Extinction" - Some Key Points - Dr. L. Mark Elbroch