BirdAnalyst
BBS Route · Pennsylvania · BCR 28

Bald Eagle Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 114 species recorded across 47 survey years, still active.

114Species RecordedSpecies recordedDistinct species detected on standard-protocol BBS runs here across all years on record — a measure of survey breadth, not a complete checklist.Full methodology →
47Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1969–2025Span
6Observers

Bird Species Found on Pennsylvania Bald Eagle

Top 40 of 114 species by most recent count. Each links to its species trend.

Species recorded on the Bald Eagle route.
Recent countThe raw number of individuals recorded on this route in its most recent survey year. A single-route tally, not a trend.Full methodology →TrendPercent change in the route-weighted abundance index between a smoothed baseline window and the most recent one. It tracks direction, not absolute population.Full methodology →Baseline yearThe first year of the smoothed window the trend is measured from. An earlier baseline means a longer record stands behind the number.Full methodology →History
European StarlingSturnidae972025+28%1972
American RobinTurdidae592025+51%1972
Chimney SwiftApodidae322025+144%1972
Song SparrowPasserellidae262025+33%1972
Barn SwallowHirundinidae252025+122%1972
Chipping SparrowPasserellidae242025+12%1972
Turkey VultureCathartidae22202512×1980
Gray CatbirdMimidae182025+121%1972
Common GrackleIcteridae162025-65%1972
Red-winged BlackbirdIcteridae142025-64%1972
Red-eyed VireoVireonidae142025+43%1972
Mourning DoveColumbidae122025+267%1972
House SparrowPasseridae122025-67%1972
Northern CardinalCardinalidae112025+58%1972
Carolina WrenTroglodytidae112025+314%1991
American GoldfinchFringillidae102025-43%1972
American CrowCorvidae92025-47%1972
Rock PigeonColumbidae72025-51%1972
Purple MartinHirundinidae72025+640%2022
Yellow-billed CuckooCuculidae62023+200%1973
KilldeerCharadriidae52024+0%1977
Brown-headed CowbirdIcteridae52025-46%1972
Eastern TowheePasserellidae52025-53%1972
Hairy WoodpeckerPicidae52021+225%1991
House FinchFringillidae52025+88%1981
Scarlet TanagerCardinalidae42025-8%1972
Cedar WaxwingBombycillidae42025+314%1973
Wood ThrushTurdidae42025-65%1972
Tree SwallowHirundinidae42025+50%1997
Eastern BluebirdTurdidae42025+250%1988
Great Crested FlycatcherTyrannidae32024-53%1972
Horned LarkAlaudidae32025-14%1977
Indigo BuntingCardinalidae32025-59%1972
Northern House WrenTroglodytidae32025-59%1972
Tufted TitmouseParidae32025+120%1972
Northern MockingbirdMimidae32025+200%1980
Blackburnian WarblerParulidae32023+150%2005
Red-bellied WoodpeckerPicidae32025+280%1989
Belted KingfisherAlcedinidae22018+33%1982
Downy WoodpeckerPicidae22025+100%1972

Source: USGS North American Breeding Bird Survey, retrieved 2026-08-14. A route is a sample, not a census.