Prominent among a great variety of song-birds and insectivorous birds are the robin, blue bird, cat bird, sparrows, meadow-lark, bobolink, thrushes, chickadee, wrens, brown thrasher, gold finch, cedar wax-wing, flycatchers, nuthatches, flicker (golden-winged woodpecker), downy and hairy woodpeckers, rose-breasted grosbeak, Baltimore oriole, barnswallow, chimney swift, purple martin, purple finch (linnet), vireos and several species of warblers.
The robin, song sparrow, chickadee, thrushes, warblers, vireos, orioles, wrens, blue-bird, cat-bird and phoebe are favourite song birds.
The song and insectivorous birds - thrushes, flycatchers, vireos and woodpeckers - of this latitude, are well represented, and the high plateaus (particularly the Pocono plateau) have especial ornithological interest as the tarrying-places, during the migratory seasons, of many species of birds whose natural breeding ground is much farther north.
Robins, bluebirds, warblers, chickadees, finches, vireos, wrens, yellow-headed blackbirds, nutcrackers, nuthatches, meadow-larks, sparrows, woodpeckers, swifts, kingbirds and several other species of small birds are found in the park, but the number of each is not great.
The more characteristic and useful birds include many species of the sparrow, such as the song, swamp, Lincoln's chipping and field sparrow; the bank, barn, cliff, white-bellied and rough-winged swallow, as well as the purple martin and the chimney swift; ten or more species of fly-catchers, including the least, arcadian, phoebe, wood pewee, olive-sided and king bird; about ten species of woodpeckers, of which the more common are the downy, hairy, yellowbellied and golden-winged (flicker); about thirty species of warblers, including the parula, cerulean, Blackburnian, prothonotary, yellow Nashville, red-start, worm-eating and chestnut-sided; and four or five species of vireos.