Last mountain lions in Pennsylvania revealed in history, folklore and newspapers
Eastern mountain lion officially declared extinct
About Mountain Lions - Mountain Lion Foundation
PA Game Commission: Mountain lions are not lurking in Back Mountain
Are Eastern Cougars Breeding? An Official Journal Of The NRA
Bringing Back the Cougars - JSTOR Daily
Big cats in Pennsylvania: mountain lions or bobcats?
One-in-a-million, white 'spirit bear' spotted in Upper Peninsula
Last mountain lions in Pennsylvania revealed in history, folklore and newspapers
Pennsylvania Mountain Lion Was Regular Sight Until End of 19th Century, Then It Simply Disappeared
Does the eastern US have room for cougars? - West Virginia Highlands Conservancy
Wyoming County hunter found evidence of Cougars