U.S. authorities declare Eastern puma extinct, 80 years after last sighting - Portland Press Herald
The Eastern Puma Has Been Officially Declared Extinct
North American cougar - Wikipedia
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 US cougar declared extinct
Why Making The Eastern Puma Extinct Is A Good Thing - UNILAD
Federal agency says Eastern puma extinct, drops protections
North American Puma/Cougar - extinct? | Page 3 | AfricaHunting.com
Eastern Puma declared officially extinct
Eastern Cougar extinct, no longer needs protection, says US conservation agency | Wildlife | The Guardian