 In addition to bald eagles, which live in the IBA year round and have successfully established a breeding population there, the IBA is home to belted kingfishers, scarlet tanagers, black-throated blue warblers, common mergansers, blue and green heron, hermit thrushes, and wood ducks. Large numbers of ospreys use the gorge during spring and fall migration periods. The woodlands are inhabited by the ruffed grouse, Pennsylvania's state bird, and wild turkeys. Swainson's thrush breeds in the IBA and the northern harrier breeds and overwinters in Pine Creek Gorge.
