BirdAnalyst
BBS Route · Pennsylvania · BCR 28

Little Marsh Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 126 species recorded across 49 survey years, still active.

126Species 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 →
49Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1967–2024Span
4Observers

Bird Species Found on Pennsylvania Little Marsh

Top 40 of 126 species by most recent count. Each links to its species trend.

Species recorded on the Little Marsh 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 BlackbirdIcteridae972024-31%1969
American RobinTurdidae572024-51%1969
BobolinkIcteridae47202411×1970
Mourning DoveColumbidae452024+765%1972
Song SparrowPasserellidae442024-58%1969
American CrowCorvidae362024-15%1969
OvenbirdParulidae332024+692%1980
Common YellowthroatParulidae312024+736%1973
Common GrackleIcteridae302024-22%1969
European StarlingSturnidae282024-13%1969
Red-eyed VireoVireonidae252024+50%1969
Gray CatbirdMimidae212024+4%1969
Eastern MeadowlarkIcteridae202024-2%1969
Yellow WarblerParulidae192024+8%1969
Blue JayCorvidae182024+4%1969
Black-capped ChickadeeParidae182024+254%1969
Cedar WaxwingBombycillidae172024+182%1969
Eastern PhoebeTyrannidae162024-40%1969
Chipping SparrowPasserellidae142024-72%1969
Barn SwallowHirundinidae142024-23%1969
Eastern TowheePasserellidae122024-61%1969
Northern House WrenTroglodytidae122024+68%1969
American GoldfinchFringillidae102024-33%1969
Yellow-bellied SapsuckerPicidae102024+650%1997
Wood ThrushTurdidae92024-46%1969
Indigo BuntingCardinalidae92024+140%1972
Alder FlycatcherTyrannidae82023+11%1997
Field SparrowPasserellidae72024-78%1969
Hermit ThrushTurdidae72024+80%1990
Rose-breasted GrosbeakCardinalidae72024+44%1976
Common RavenCorvidae72024+500%1997
House SparrowPasseridae62024-87%1969
Eastern Wood-PeweeTyrannidae62024+88%1972
Tufted TitmouseParidae52024+57%1993
Savannah SparrowPasserellidae52024-14%1970
Northern CardinalCardinalidae52024-8%1972
Yellow-billed CuckooCuculidae52023-23%1995
Rock PigeonColumbidae42019+17%1980
Tree SwallowHirundinidae42024+14%1969
Chestnut-sided WarblerParulidae42024+433%1977

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