BirdAnalyst
BBS Route · Pennsylvania · BCR 29

Aspers Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 86 species recorded across 19 survey years, no longer active.

86Species 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 →
19Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1968–1989Span
3Observers

Bird Species Found on Pennsylvania Aspers

Top 40 of 86 species by most recent count. Each links to its species trend.

Species recorded on the Aspers 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
Common GrackleIcteridae1911989-54%1970
European StarlingSturnidae1871989-36%1970
American RobinTurdidae1531989+61%1970
House SparrowPasseridae981989-22%1970
Red-winged BlackbirdIcteridae781989-50%1970
Mourning DoveColumbidae521989+108%1970
Rock PigeonColumbidae431989-20%1970
Chimney SwiftApodidae421989-11%1970
Barn SwallowHirundinidae391989-46%1970
American CrowCorvidae381989-2%1970
House FinchFringillidae341989+274%1983
MallardAnatidae311989+65%1970
Northern CardinalCardinalidae291989+57%1970
Eastern MeadowlarkIcteridae251989+43%1970
Northern MockingbirdMimidae251989+240%1970
Field SparrowPasserellidae211989+233%1970
Song SparrowPasserellidae201989+79%1970
Chipping SparrowPasserellidae181989+20%1970
Northern House WrenTroglodytidae151989+20%1970
Gray CatbirdMimidae111989-35%1970
Blue JayCorvidae101989-26%1970
Brown-headed CowbirdIcteridae91989+18%1970
Eastern PhoebeTyrannidae81989+140%1970
Canada GooseAnatidae81984-74%1983
KilldeerCharadriidae71989+100%1970
Eastern TowheePasserellidae71989+7%1970
Indigo BuntingCardinalidae71989-35%1970
Wood ThrushTurdidae71989-12%1971
Yellow-billed CuckooCuculidae71983+275%1974
Tufted TitmouseParidae61989+117%1970
Purple MartinHirundinidae51988-79%1971
Cedar WaxwingBombycillidae51989+400%1977
Grasshopper SparrowPasserellidae41989+67%1970
Black VultureCathartidae41988n/an/a
Ring-necked PheasantPhasianidae31989-75%1970
Turkey VultureCathartidae31988+133%1973
Great Crested FlycatcherTyrannidae31988+120%1970
Eastern Wood-PeweeTyrannidae31988+14%1970
Common YellowthroatParulidae31988+57%1970
Brown ThrasherMimidae31989-13%1970

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