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)
The Eastern Puma Has Been Officially Declared Extinct
Are Pumas extinct? - Quora
Eastern cougar declared extinct by US government - CSMonitor.com
Eastern puma declared extinct––but did it ever really exist? - Animals 24-7
Eastern Cougar "Extinction" - Some Key Points - Dr. L. Mark Elbroch