Eastern puma declared extinct, 80 years after last confirmed sighting - The Wildlife Society
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 declared extinct by US government - CSMonitor.com
Extinct puma, cougar may never have existed in South Carolina
Puma That Vanished from U.S. East Coast 80 Years Ago Sadly Declared Extinct
What's the Difference Between Cougar, Puma & Mountain Lion