Are Mountain Lions Endangered? Conservation Status
You saw a cougar? Not in eastern U.S., you didn't!
Cougar - Wikipedia
Eastern puma declared extinct, 80 years after last confirmed sighting - The Wildlife Society
Eastern cougar declared extinct, but whether it ever existed is a question | CBC News
How We're Helping Protect Endangered Florida Panthers
Extinct puma, cougar may never have existed in South Carolina
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)
This Isn't the End of the Eastern Cougar
Cougar – International Society for Endangered Cats (ISEC) Canada
Book of the Week: The Extinction of the Eastern Cougar – Biodiversity Heritage Library
Eastern Cougars Declared Extinct—But That Might Not be Bad
Eastern US cougar declared extinct
Feds Prepare to Declare Eastern Cougar Extinct
North American cougar - Wikipedia
Eastern Cougar "Extinction" - Some Key Points - Dr. L. Mark Elbroch
The Eastern Cougar Is Officially Extinct - Atlas Obscura
Eastern Puma declared officially extinct
Protecting Mountain Lions Before They Become Endangered