BirdAnalyst
BBS Route · Pennsylvania · BCR 28

Marsh Hill Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 122 species recorded across 42 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 →
42Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1983–2025Span
2Observers

Bird Species Found on Pennsylvania Marsh Hill

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

Species recorded on the Marsh Hill 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-eyed VireoVireonidae912025+145%1985
American RobinTurdidae702025+20%1985
OvenbirdParulidae522025+80%1986
Gray CatbirdMimidae372025+284%1985
American CrowCorvidae352025-18%1985
Red-winged BlackbirdIcteridae212025-39%1985
Yellow-bellied SapsuckerPicidae192025+686%1986
Eastern TowheePasserellidae192025+136%1986
Mourning DoveColumbidae172025+73%1985
European StarlingSturnidae172025-64%1985
Scarlet TanagerCardinalidae162025-28%1986
Blue-headed VireoVireonidae162025+132%1986
Tufted TitmouseParidae162025+425%1986
Song SparrowPasserellidae132025+59%1985
Northern CardinalCardinalidae132025+242%1986
Common GrackleIcteridae122025-28%1985
Barn SwallowHirundinidae122025-76%1985
Northern House WrenTroglodytidae122025+19%1985
VeeryTurdidae122025+96%1986
Hermit ThrushTurdidae122025-21%1986
Blue JayCorvidae112025-6%1985
American RedstartParulidae112025+16%1985
Black-capped ChickadeeParidae112025-12%1986
Wood ThrushTurdidae112025-28%1985
American GoldfinchFringillidae92025+53%1985
Common YellowthroatParulidae92025-18%1986
Eastern PhoebeTyrannidae82025+107%1985
Eastern Wood-PeweeTyrannidae82025+39%1986
Chestnut-sided WarblerParulidae82025+560%1990
Yellow WarblerParulidae72025+0%1986
Canada WarblerParulidae72025+400%1987
Purple FinchFringillidae62025+300%1986
Magnolia WarblerParulidae62025+80%1987
Brown-headed CowbirdIcteridae52025-71%1985
Chipping SparrowPasserellidae52025-67%1985
Rose-breasted GrosbeakCardinalidae52025-70%1986
Indigo BuntingCardinalidae52025-60%1985
Black-throated Green WarblerParulidae52025-61%1986
Eastern BluebirdTurdidae52025+100%1987
Pileated WoodpeckerPicidae42025+88%1986

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