The cool, damp habitat provided by the bogs at Black Moshannon State Park provides a home for some birds that are at the southern limit of their habitat in central Pennsylvania. The Canada warbler and northern waterthrush nest in the bogs, as do the alder flycatcher, common yellowthroat, swamp sparrow, red-winged blackbird, and gray catbird. The olive-sided flycatcher, which is designated as locally extinct in Pennsylvania, has been seen during the breeding season at Black Moshannon State Natural Area. Bird watchers have observed nesting barred owls in the IBA, as well as Virginia rail and sora.