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 herons, hermit thrushes, and wood ducks. Large numbers of ospreys use the gorge during spring and fall migration periods. The woodlands are inhabited by wild turkeys and Pennsylvania's state bird the ruffed grouse. Swainson's thrush breeds in the IBA and the Northern harrier breeds and overwinters in Pine Creek Gorge.