BirdAnalyst
BBS Route · Pennsylvania · BCR 28

Jefferson Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 106 species recorded across 59 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 →
59Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1966–2025Span
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
European StarlingSturnidae1062025-24%1968
Red-winged BlackbirdIcteridae1032025-49%1968
American RobinTurdidae972025+30%1968
Common GrackleIcteridae442025-54%1968
Song SparrowPasserellidae372025+35%1968
Barn SwallowHirundinidae362025-1%1968
Common YellowthroatParulidae352025+28%1968
Yellow WarblerParulidae322025+72%1968
Gray CatbirdMimidae312025+55%1968
Wood ThrushTurdidae302025+75%1968
Northern CardinalCardinalidae282025+51%1968
Mourning DoveColumbidae252025+929%1969
Eastern TowheePasserellidae222025+36%1968
Red-eyed VireoVireonidae212025+33%1968
American CrowCorvidae202025-65%1968
Eastern Wood-PeweeTyrannidae172025+16%1968
American Black DuckAnatidae161976+433%1966
Chipping SparrowPasserellidae162025-43%1968
Indigo BuntingCardinalidae152025-38%1968
Chimney SwiftApodidae132025-49%1968
American GoldfinchFringillidae132025-53%1968
Field SparrowPasserellidae132025-51%1968
House SparrowPasseridae132025-80%1968
Rock PigeonColumbidae122025+41%1969
Red-bellied WoodpeckerPicidae122025+386%1969
Tufted TitmouseParidae122025+0%1968
American RedstartParulidae112025+475%1977
Eastern BluebirdTurdidae102025-7%1968
Turkey VultureCathartidae92025-44%1970
Acadian FlycatcherTyrannidae92025-52%1968
Orchard OrioleIcteridae92025+183%1968
Warbling VireoVireonidae92025+11%1968
White-eyed VireoVireonidae92025+283%1968
Willow FlycatcherTyrannidae82025+18%1968
Scarlet TanagerCardinalidae82025+13%1968
Eastern KingbirdTyrannidae72025-23%1968
Eastern PhoebeTyrannidae72025-28%1968
Blue JayCorvidae72025+425%1970
Canada GooseAnatidae72025+55%1990
Northern MockingbirdMimidae62025+143%1969

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