BirdAnalyst
BBS Route · Pennsylvania · BCR 13

Clover Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 111 species recorded across 32 survey years, still active.

111Species 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 →
32Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1981–2024Span
6Observers

Bird Species Found on Pennsylvania Clover

Top 40 of 111 species by most recent count. Each links to its species trend.

Species recorded on the Clover 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 BlackbirdIcteridae1222024-31%1989
Rock PigeonColumbidae1002024+445%1989
European StarlingSturnidae862024+6%1989
American RobinTurdidae712024-22%1989
Mourning DoveColumbidae392024+12%1989
Song SparrowPasserellidae362024-37%1989
Northern CardinalCardinalidae232024-27%1989
Barn SwallowHirundinidae222024+15%1989
American CrowCorvidae202024-71%1989
House SparrowPasseridae192024-66%1989
Gray CatbirdMimidae182024+17%1989
American GoldfinchFringillidae152024-39%1989
Red-eyed VireoVireonidae152024+43%1989
Chipping SparrowPasserellidae142024-49%1989
Northern House WrenTroglodytidae122024+100%1989
Eastern BluebirdTurdidae122024+46%1989
Tufted TitmouseParidae112024+95%1989
Blue JayCorvidae102024-58%1989
Brown-headed CowbirdIcteridae102024+35%1989
Indigo BuntingCardinalidae102024-33%1989
Chimney SwiftApodidae92024-18%1989
Eastern Wood-PeweeTyrannidae82024+33%1989
Yellow WarblerParulidae82024+11%1989
Carolina WrenTroglodytidae82024+280%1994
Eastern MeadowlarkIcteridae72024-65%1989
Common GrackleIcteridae72024-78%1989
KilldeerCharadriidae62024-60%1989
House FinchFringillidae62024-23%1990
Eastern PhoebeTyrannidae52024+220%1989
Common YellowthroatParulidae52024-72%1989
Turkey VultureCathartidae42024+167%1990
Red-headed WoodpeckerPicidae41993+100%1990
Red-bellied WoodpeckerPicidae42024+280%1989
Eastern TowheePasserellidae42024-25%1990
Rose-breasted GrosbeakCardinalidae42024+350%1989
Wood ThrushTurdidae42024-61%1989
Canada GooseAnatidae42023-86%1993
Henslow's SparrowPasserellidae41993n/an/a
Northern MockingbirdMimidae42024+160%2004
Acadian FlycatcherTyrannidae32024-23%1989

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