BirdAnalyst
BBS Route · Pennsylvania · BCR 28

Ralston Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 83 species recorded across 11 survey years, no longer active.

83Species 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 →
11Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1966–1978Span
2Observers

Bird Species Found on Pennsylvania Ralston

Top 40 of 83 species by most recent count. Each links to its species trend.

Species recorded on the Ralston 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 RobinTurdidae1161978+83%1970
Barn SwallowHirundinidae1131978+90%1970
Red-winged BlackbirdIcteridae1091978-17%1970
Common GrackleIcteridae231978+122%1970
Song SparrowPasserellidae231978+8%1970
American CrowCorvidae211978-43%1970
House SparrowPasseridae191978+8%1970
Blue JayCorvidae141978+87%1970
European StarlingSturnidae131978-18%1970
Wood ThrushTurdidae121978-22%1970
Chipping SparrowPasserellidae111978-28%1970
Northern House WrenTroglodytidae111978+32%1970
American GoldfinchFringillidae101978+0%1970
Least FlycatcherTyrannidae91966n/an/a
Cedar WaxwingBombycillidae91978+160%1970
Red-eyed VireoVireonidae91978-31%1970
Gray CatbirdMimidae91978+67%1970
Mourning DoveColumbidae71978+157%1971
Common YellowthroatParulidae71978-12%1971
Eastern PhoebeTyrannidae61978+89%1970
Brown-headed CowbirdIcteridae61978-55%1970
Baltimore OrioleIcteridae61978-17%1970
Indigo BuntingCardinalidae61978+36%1970
Field SparrowPasserellidae51978-36%1970
Eastern BluebirdTurdidae51969+67%1966
Chimney SwiftApodidae51978-46%1971
Yellow WarblerParulidae41978+13%1973
Ruffed GrousePhasianidae31966n/an/a
Hairy WoodpeckerPicidae31973+150%1970
BobolinkIcteridae31978+67%1970
Eastern TowheePasserellidae31977-18%1970
OvenbirdParulidae31978+25%1970
Black-capped ChickadeeParidae31978+50%1970
Rock PigeonColumbidae31974n/an/a
House FinchFringillidae31978n/an/a
Downy WoodpeckerPicidae21977+0%1972
Eastern KingbirdTyrannidae21977-64%1971
Eastern MeadowlarkIcteridae21978-84%1970
Vesper SparrowPasserellidae21966n/an/a
Grasshopper SparrowPasserellidae21966n/an/a

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