BirdAnalyst
BBS Route · Pennsylvania · BCR 13

Harmonsburg Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 122 species recorded across 50 survey years, still active.

122Species 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 →
50Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1966–2023Span
8Observers

Bird Species Found on Pennsylvania Harmonsburg

Top 40 of 122 species by most recent count. Each links to its species trend.

Species recorded on the Harmonsburg 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-winged BlackbirdIcteridae1322023-47%1968
European StarlingSturnidae1222023-26%1968
American RobinTurdidae792023+47%1968
House SparrowPasseridae632023-34%1968
Chimney SwiftApodidae582023+174%1968
Song SparrowPasserellidae572023+7%1968
Cedar WaxwingBombycillidae55202311×1968
Common GrackleIcteridae502023+29%1968
Yellow WarblerParulidae462023+13%1968
American CrowCorvidae452023+58%1968
Mourning DoveColumbidae362023+100%1968
Northern House WrenTroglodytidae362023+186%1968
Chipping SparrowPasserellidae342023+122%1968
Common YellowthroatParulidae342023+30%1968
Eastern Wood-PeweeTyrannidae282023+129%1968
Red-eyed VireoVireonidae282023+188%1968
Gray CatbirdMimidae272023+165%1968
Barn SwallowHirundinidae262023+167%1968
Northern CardinalCardinalidae242023+326%1968
Indigo BuntingCardinalidae242023-2%1968
Warbling VireoVireonidae242023+154%1968
Baltimore OrioleIcteridae182023-7%1968
Red-bellied WoodpeckerPicidae172023+560%1998
American GoldfinchFringillidae152023-37%1968
Brown-headed CowbirdIcteridae142023+44%1968
Eastern PhoebeTyrannidae132023+35%1968
Purple MartinHirundinidae132023+106%1968
Willow FlycatcherTyrannidae122023-21%1975
Eastern MeadowlarkIcteridae112023-90%1968
Eastern BluebirdTurdidae112023+717%1970
Blue JayCorvidae102023+146%1968
Wood ThrushTurdidae102023+5%1968
House FinchFringillidae102023+28%1989
American RedstartParulidae92023+200%1969
KilldeerCharadriidae82023+44%1968
Eastern TowheePasserellidae72023-29%1968
Rose-breasted GrosbeakCardinalidae72023+167%1968
Acadian FlycatcherTyrannidae72023+233%2001
Great Crested FlycatcherTyrannidae62023+43%1968
BobolinkIcteridae62023-84%1968

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