Conservationists have been trying for five years to gain endangered status for the amphibian that is an indicator of clean ...

In the 1980s, there were focused reintroduction efforts, which led to a population rebound of the American river otter in northern Pennsylvania, according to the trust. The sighting is monumental ...

Two recent ones that come to mind are the bald eagle and the peregrine falcon. The latest is the fisher. This forest-dwelling creature is the second-largest member of the weasel family in Pennsylvania ...