BirdAnalyst
BBS Route · Pennsylvania · BCR 13

Clover Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 111 species recorded across 33 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 →
33Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1981–2025Span
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
American RobinTurdidae732025-20%1989
Red-winged BlackbirdIcteridae722025-31%1989
European StarlingSturnidae512025-9%1989
Northern CardinalCardinalidae342025-23%1989
Song SparrowPasserellidae322025-36%1989
Mourning DoveColumbidae302025+15%1989
Barn SwallowHirundinidae302025+11%1989
House SparrowPasseridae252025-73%1989
Common GrackleIcteridae242025-77%1989
Rock PigeonColumbidae202025+515%1989
Chimney SwiftApodidae192025-11%1989
Gray CatbirdMimidae152025+22%1989
American GoldfinchFringillidae132025-48%1989
Chipping SparrowPasserellidae132025-57%1989
Red-eyed VireoVireonidae122025+40%1989
Blue JayCorvidae112025-56%1989
Carolina WrenTroglodytidae112025+400%1994
KilldeerCharadriidae102025-56%1989
Brown-headed CowbirdIcteridae102025+41%1989
Eastern BluebirdTurdidae102025+85%1989
Yellow WarblerParulidae92025+7%1989
Common YellowthroatParulidae92025-69%1989
Northern House WrenTroglodytidae92025+76%1989
Wood ThrushTurdidae92025-39%1989
House FinchFringillidae92025-26%1990
Eastern Wood-PeweeTyrannidae72025+29%1989
American CrowCorvidae72025-72%1989
Tufted TitmouseParidae72025+90%1989
Red-bellied WoodpeckerPicidae62025+280%1989
Eastern MeadowlarkIcteridae62025-57%1989
Rose-breasted GrosbeakCardinalidae62025+325%1989
Black-capped ChickadeeParidae62025-39%1989
Turkey VultureCathartidae52025+233%1990
Acadian FlycatcherTyrannidae52025-23%1989
Indigo BuntingCardinalidae52025-50%1989
Yellow-throated VireoVireonidae52025+100%1991
Red-headed WoodpeckerPicidae41993+100%1990
Eastern TowheePasserellidae42024-25%1990
American RedstartParulidae42025+100%1990
Canada GooseAnatidae42023-86%1993

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