BirdAnalyst
BBS Route · Pennsylvania · BCR 29

Shrewsbury Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 93 species recorded across 32 survey years, still active.

93Species 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 →
32Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1991–2023Span
2Observers

Bird Species Found on Pennsylvania Shrewsbury

Top 40 of 93 species by most recent count. Each links to its species trend.

Species recorded on the Shrewsbury 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
Mourning DoveColumbidae382023-49%1993
European StarlingSturnidae372023-64%1993
Canada GooseAnatidae372022+210%1995
American CrowCorvidae282023-12%1993
Barn SwallowHirundinidae262023-38%1993
Chipping SparrowPasserellidae222023+29%1993
Gray CatbirdMimidae222023-17%1993
American RobinTurdidae222023-55%1993
Song SparrowPasserellidae212023+13%1993
Red-winged BlackbirdIcteridae182023-78%1993
Blue JayCorvidae172023-13%1993
Common GrackleIcteridae172022-88%1993
Northern MockingbirdMimidae172023-44%1993
Northern CardinalCardinalidae152023-49%1993
Red-bellied WoodpeckerPicidae112023-4%1993
Northern House WrenTroglodytidae112023-53%1993
American GoldfinchFringillidae102023-26%1993
Indigo BuntingCardinalidae102023-71%1993
Field SparrowPasserellidae92023-40%1993
Carolina WrenTroglodytidae92023-30%1993
Eastern BluebirdTurdidae62023+13%1993
Turkey VultureCathartidae62023+400%1997
Downy WoodpeckerPicidae52023+233%1996
Chimney SwiftApodidae52023-76%1993
Fish CrowCorvidae52023+43%1993
House FinchFringillidae52023-80%1993
Grasshopper SparrowPasserellidae52023+150%1993
Common YellowthroatParulidae52023-23%1993
House SparrowPasseridae52023-94%1993
Great Blue HeronArdeidae42019+80%1996
Horned LarkAlaudidae42023+367%1995
Baltimore OrioleIcteridae42022-43%1993
Blue GrosbeakCardinalidae42017+20%1998
White-breasted NuthatchSittidae42023+33%1994
Red-tailed HawkAccipitridae42022+50%1994
Green HeronArdeidae32012+67%1995
Rock PigeonColumbidae32022-79%1993
Eastern PhoebeTyrannidae32023-36%1993
Eastern Wood-PeweeTyrannidae32023-59%1993
Red-eyed VireoVireonidae32023-11%1993

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