Seasonal Presence and Relative Frequency of Selected Species
This list summarizes the seasonal presence of selected bird species in Pennsylvania, indicating whether each species occurs year-round, during the breeding season, or during the non-breeding season (winter and migration). Within each seasonal category, species are numbered and ordered from least to most frequently observed in the United States based on eBird frequency data. This ordering reflects how commonly a species has been observed by U.S. birders over time and is used here as a relative priority indicator, not as a measure of local abundance or the likelihood of encountering a species at a specific site or season within Pennsylvania.
Ruffed Grouse
Northern Bobwhite
American Black Duck
Great Black-backed Gull
Henslow’s Sparrow
Cerulean Warbler
Golden-winged Warbler
Black-billed Cuckoo
Mourning Warbler
Piping Plover
Kentucky Warbler
American Woodcock
Worm-eating Warbler
Alder Flycatcher
Clay-colored Sparrow
Canada Warbler
Mississippi Kite
Blue-winged Warbler
Louisiana Waterthrush
Prothonotary Warbler
Yellow-crowned Night Heron
Bobolink
Dickcissel
Blackburnian Warbler
Hooded Warbler
Prairie Warbler
Willow Flycatcher
Black-throated Blue Warbler
Least Flycatcher
Yellow-throated Warbler
Veery
Orchard Oriole
Chestnut-sided Warbler
Magnolia Warbler
Black-throated Green Warbler
Scarlet Tanager
Rose-breasted Grosbeak
Baltimore Oriole
Indigo Bunting
American Goshawk
Snowy Owl
Northern Shrike
Snow Bunting
Red-necked Grebe
Rough-legged Hawk
Lesser Black-backed Gull
Redpoll
Evening Grosbeak
Tundra Swan
Long-tailed Duck
Snow Goose
American Tree Sparrow
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