BirdAnalyst
BBS Route · Pennsylvania · BCR 28

Peru Mills Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 117 species recorded across 47 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 →
47Years 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 Peru Mills

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

Species recorded on the Peru Mills 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 VireoVireonidae382025+177%1968
Gray CatbirdMimidae282025+103%1968
Red-winged BlackbirdIcteridae272025-74%1968
American RobinTurdidae262025-59%1968
European StarlingSturnidae222025-69%1968
Northern CardinalCardinalidae222025+34%1968
Song SparrowPasserellidae192025+26%1968
Barn SwallowHirundinidae192025-66%1968
Turkey VultureCathartidae182025+100%1968
American CrowCorvidae182025-48%1968
Indigo BuntingCardinalidae162025-42%1968
Cedar WaxwingBombycillidae162025+475%1979
House SparrowPasseridae152025-83%1968
OvenbirdParulidae142025+215%1968
Wood ThrushTurdidae102025-17%1968
Chipping SparrowPasserellidae92025-63%1968
American RedstartParulidae92025+171%1971
Carolina WrenTroglodytidae92025+767%1969
Tree SwallowHirundinidae92025+433%1977
House FinchFringillidae92025-32%1990
Mourning DoveColumbidae82025+21%1968
Common YellowthroatParulidae82025-5%1968
Tufted TitmouseParidae82025-22%1968
Chimney SwiftApodidae72025-80%1968
Great Crested FlycatcherTyrannidae72025-20%1968
Brown-headed CowbirdIcteridae72025-48%1968
Field SparrowPasserellidae72025-59%1968
Baltimore OrioleIcteridae62025-39%1968
Common GrackleIcteridae62025-92%1968
Yellow-throated VireoVireonidae62024+180%1969
Northern MockingbirdMimidae62025+400%1969
Rock PigeonColumbidae52025-88%1968
Scarlet TanagerCardinalidae52025+0%1968
Red-bellied WoodpeckerPicidae52025+633%1977
Red-tailed HawkAccipitridae52024+133%1995
Wild TurkeyPhasianidae52024+250%2001
Acadian FlycatcherTyrannidae42025+250%1968
Blue JayCorvidae42025-50%1968
American GoldfinchFringillidae42025-63%1968
Yellow WarblerParulidae42025-16%1968

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