BirdAnalyst
BBS Route · Pennsylvania · BCR 28

Jefferson Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 106 species recorded across 58 survey years, still active.

106Species 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 →
58Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1966–2024Span
3Observers

Bird Species Found on Pennsylvania Jefferson

Top 40 of 106 species by most recent count. Each links to its species trend.

Species recorded on the Jefferson 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
American RobinTurdidae662024+10%1968
Red-winged BlackbirdIcteridae632024-48%1968
European StarlingSturnidae422024-49%1968
Canada GooseAnatidae342024+62%1990
Yellow WarblerParulidae272024+21%1968
Song SparrowPasserellidae252024+7%1968
Mourning DoveColumbidae242024+814%1969
Barn SwallowHirundinidae232024-41%1968
Gray CatbirdMimidae212024+5%1968
Northern CardinalCardinalidae192024+47%1968
Common YellowthroatParulidae192024-15%1968
Cedar WaxwingBombycillidae182024+600%1968
Wood ThrushTurdidae182024+33%1968
American CrowCorvidae172024-62%1968
House SparrowPasseridae172024-86%1968
American Black DuckAnatidae161976+433%1966
Chimney SwiftApodidae162024-44%1968
Eastern TowheePasserellidae162024+47%1968
Indigo BuntingCardinalidae152024-47%1968
Eastern Wood-PeweeTyrannidae142024-25%1968
Eastern BluebirdTurdidae142024-26%1968
Common GrackleIcteridae132024-77%1968
Red-eyed VireoVireonidae122024-17%1968
Carolina WrenTroglodytidae122024+600%1968
Field SparrowPasserellidae112024-72%1968
Rock PigeonColumbidae102024-18%1969
Chipping SparrowPasserellidae102024-71%1968
Red-bellied WoodpeckerPicidae82024+357%1969
Scarlet TanagerCardinalidae82024-27%1968
Northern MockingbirdMimidae82024+143%1969
Tufted TitmouseParidae82024+3%1968
Carolina ChickadeeParidae82024+40%1968
Willow FlycatcherTyrannidae72024+0%1968
American RedstartParulidae72024+275%1977
Tree SwallowHirundinidae62024+63%1981
American GoldfinchFringillidae52024-69%1968
Blue JayCorvidae52024+425%1970
Turkey VultureCathartidae42024-56%1970
Brown-headed CowbirdIcteridae42024-74%1968
Orchard OrioleIcteridae42024+67%1968

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