BirdAnalyst
BBS Route · Pennsylvania · BCR 28

Waller Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 126 species recorded across 52 survey years, still active.

126Species 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 →
52Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1971–2025Span
2Observers

Bird Species Found on Pennsylvania Waller

Top 40 of 126 species by most recent count. Each links to its species trend.

Species recorded on the Waller 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
American RobinTurdidae1062025+40%1975
Red-winged BlackbirdIcteridae742025-30%1975
Red-eyed VireoVireonidae632025+521%1975
Gray CatbirdMimidae562025+256%1975
American CrowCorvidae492025-7%1975
Song SparrowPasserellidae392025+71%1975
Mourning DoveColumbidae362025+133%1975
Common GrackleIcteridae332025-74%1975
European StarlingSturnidae292025-53%1975
Tufted TitmouseParidae272025+375%1975
Canada GooseAnatidae262025+29%1995
Northern CardinalCardinalidae252025+60%1975
Barn SwallowHirundinidae252025-33%1975
Indigo BuntingCardinalidae212025-41%1975
Eastern TowheePasserellidae202025+84%1975
Yellow WarblerParulidae192025+136%1975
Common YellowthroatParulidae172025+17%1975
OvenbirdParulidae162025+191%1975
Rock PigeonColumbidae152024-55%1975
Baltimore OrioleIcteridae152025+55%1975
Red-bellied WoodpeckerPicidae152025+560%1996
American GoldfinchFringillidae142025-2%1975
Scarlet TanagerCardinalidae142025+175%1975
Blue JayCorvidae132025+15%1975
Chipping SparrowPasserellidae132025-41%1975
Northern House WrenTroglodytidae132025-34%1975
Field SparrowPasserellidae112025-30%1975
Carolina WrenTroglodytidae102025+600%1978
House FinchFringillidae102025+244%1983
White-breasted NuthatchSittidae92025+500%1978
House SparrowPasseridae82025-57%1975
Wood ThrushTurdidae82025-36%1975
BobolinkIcteridae72025+110%1977
Cedar WaxwingBombycillidae72025+225%1975
Eastern MeadowlarkIcteridae62025-73%1975
Black-capped ChickadeeParidae62025-5%1975
Northern MockingbirdMimidae62025+320%1978
Brown ThrasherMimidae62025+167%1979
Eastern BluebirdTurdidae62025+320%1980
Pileated WoodpeckerPicidae52025+100%1976

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