BirdAnalyst
BBS Route · Pennsylvania · BCR 28

Peru Mills Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 116 species recorded across 46 survey years, still active.

116Species 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 →
46Years 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 Peru Mills

Top 40 of 116 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 VireoVireonidae532024+205%1968
Northern CardinalCardinalidae382024+57%1968
Red-winged BlackbirdIcteridae342024-73%1968
European StarlingSturnidae282024-64%1968
Carolina WrenTroglodytidae272024+767%1969
American CrowCorvidae262024-43%1968
House SparrowPasseridae242024-81%1968
Mourning DoveColumbidae212024+41%1968
Gray CatbirdMimidae162024+97%1968
Field SparrowPasserellidae152024-51%1968
Song SparrowPasserellidae152024+49%1968
Red-bellied WoodpeckerPicidae152024+800%1977
American GoldfinchFringillidae132024-62%1968
OvenbirdParulidae132024+200%1968
Indigo BuntingCardinalidae122024-33%1968
Tufted TitmouseParidae122024-13%1968
American RobinTurdidae122024-53%1968
Chipping SparrowPasserellidae112024-58%1968
Barn SwallowHirundinidae112024-71%1968
Northern MockingbirdMimidae102024+475%1969
Wood ThrushTurdidae102024-26%1968
Eastern Wood-PeweeTyrannidae82024+86%1968
Baltimore OrioleIcteridae82024-46%1968
Yellow-billed CuckooCuculidae72024-36%1968
Brown-headed CowbirdIcteridae72024-44%1968
Common YellowthroatParulidae72024-20%1968
Yellow-throated VireoVireonidae62024+180%1969
Eastern BluebirdTurdidae62024-33%1968
House FinchFringillidae62024-60%1990
Acadian FlycatcherTyrannidae52024+300%1968
Scarlet TanagerCardinalidae52024+5%1968
American RedstartParulidae52024+129%1971
Brown ThrasherMimidae52023-25%1968
Northern House WrenTroglodytidae52024-59%1968
Blue-gray GnatcatcherPolioptilidae52024+86%1969
Tree SwallowHirundinidae52024+333%1977
Red-tailed HawkAccipitridae52024+133%1995
Wild TurkeyPhasianidae52024+250%2001
Common RavenCorvidae52024+167%2010
Pileated WoodpeckerPicidae42024+0%1969

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