BirdAnalyst
BBS Route · Pennsylvania · BCR 28

Quakertown Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 82 species recorded across 18 survey years, no longer active.

82Species 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 →
18Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1970–1989Span
4Observers

Bird Species Found on Pennsylvania Quakertown

Top 40 of 82 species by most recent count. Each links to its species trend.

Species recorded on the Quakertown 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 StarlingSturnidae3031989+254%1972
American RobinTurdidae911989-6%1972
Common GrackleIcteridae671989-47%1972
Song SparrowPasserellidae491989+35%1972
Barn SwallowHirundinidae491989+74%1972
House FinchFringillidae391989+909%1980
Mourning DoveColumbidae281989+80%1972
American CrowCorvidae281989+32%1972
Chipping SparrowPasserellidae241989+49%1972
Red-winged BlackbirdIcteridae231989-68%1972
Brown-headed CowbirdIcteridae221989+258%1973
House SparrowPasseridae221989-54%1972
Gray CatbirdMimidae191989+40%1972
Blue JayCorvidae181989-29%1972
Northern MockingbirdMimidae161989+8%1972
Common YellowthroatParulidae151989+44%1972
Wood ThrushTurdidae131989+15%1972
American GoldfinchFringillidae121989-52%1972
Northern CardinalCardinalidae111989+27%1972
Chimney SwiftApodidae91989+31%1972
Indigo BuntingCardinalidae81989+50%1972
Tufted TitmouseParidae81989+200%1973
Yellow WarblerParulidae81989+200%1974
Rock PigeonColumbidae71989-27%1973
Field SparrowPasserellidae61989-58%1972
Carolina WrenTroglodytidae51989+167%1974
Willow FlycatcherTyrannidae51989+200%1978
Cedar WaxwingBombycillidae51989+100%1987
Canada GooseAnatidae41989+164%1978
Eastern PhoebeTyrannidae41989+250%1972
Eastern MeadowlarkIcteridae41987-65%1972
Baltimore OrioleIcteridae41989-55%1972
Tree SwallowHirundinidae41982+67%1971
American KestrelFalconidae41988+33%1974
Black-crowned Night HeronArdeidae41973n/an/a
KilldeerCharadriidae31989+13%1973
Eastern TowheePasserellidae31989-63%1972
Vesper SparrowPasserellidae31972+200%1971
Cliff SwallowHirundinidae31986+350%1975
MallardAnatidae31989-42%1976

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