BirdAnalyst
BBS Route · Pennsylvania · BCR 28

Susquehanna Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 117 species recorded across 40 survey years, still active.

117Species 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 →
40Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1971–2024Span
5Observers

Bird Species Found on Pennsylvania Susquehanna

Top 40 of 117 species by most recent count. Each links to its species trend.

Species recorded on the Susquehanna 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
Red-eyed VireoVireonidae742024+52%1973
OvenbirdParulidae472024+444%1973
American RobinTurdidae402024-27%1973
Song SparrowPasserellidae342024-42%1973
Common YellowthroatParulidae332024-5%1973
American CrowCorvidae302024+32%1973
Red-winged BlackbirdIcteridae282024-68%1973
VeeryTurdidae282024-1%1973
Chestnut-sided WarblerParulidae212024+128%1973
Mourning DoveColumbidae18202413×1973
Gray CatbirdMimidae182024-16%1973
Blue JayCorvidae162024+23%1973
European StarlingSturnidae162024-55%1973
Tree SwallowHirundinidae162024+96%1973
House SparrowPasseridae162024-35%1973
Eastern Wood-PeweeTyrannidae132024+83%1973
BobolinkIcteridae132024+20%1973
American GoldfinchFringillidae132024+22%1973
Northern CardinalCardinalidae132024+8%1973
Indigo BuntingCardinalidae132024+45%1973
Yellow-bellied SapsuckerPicidae132024+800%1977
Yellow WarblerParulidae122024-16%1973
Eastern PhoebeTyrannidae112024+67%1973
Eastern TowheePasserellidae102024-73%1973
Tufted TitmouseParidae102024+300%1995
Common GrackleIcteridae92024-23%1973
Northern House WrenTroglodytidae92024-46%1973
Black-capped ChickadeeParidae92024+520%1973
Field SparrowPasserellidae72024-66%1973
Scarlet TanagerCardinalidae72024-43%1973
Baltimore OrioleIcteridae62024-6%1973
Chipping SparrowPasserellidae62024-66%1973
Barn SwallowHirundinidae62024-34%1973
Chimney SwiftApodidae52021+114%1974
Eastern KingbirdTyrannidae52024-7%1973
Cliff SwallowHirundinidae52024+220%1974
Cedar WaxwingBombycillidae52024-59%1973
Warbling VireoVireonidae52024-8%1973
Black-and-white WarblerParulidae52024+58%1973
American RedstartParulidae52024-13%1973

Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22. A route is a sample, not a census.