What's the Difference Between Cougar, Puma & Mountain Lion
The Eastern Puma has been officially declared extinct. : r/Cryptozoology
The Eastern Cougar will be officially listed as extinct — almost 80 years after last sighting | The Independent | The Independent
Are Mountain Lions Endangered? Conservation Status
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 Cougars Declared Extinct—But That Might Not be Bad
Top cat: why the puma is a leading influencer in the animal kingdom | Americas | The Guardian
Mountain Lion | National Wildlife Federation
Eastern puma questions put Florida panther in peril - E&E News by POLITICO