BirdAnalyst
BBS Route · Pennsylvania · BCR 28

Betula Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 117 species recorded across 30 survey years, still active.

117Species 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 →
30Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1973–2022Span
5Observers

Bird Species Found on Pennsylvania Betula

Top 40 of 117 species by most recent count. Each links to its species trend.

Species recorded on the Betula 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 RobinTurdidae752022+53%1975
American CrowCorvidae672022+132%1975
European StarlingSturnidae612022-8%1975
Red-winged BlackbirdIcteridae512022-35%1975
Song SparrowPasserellidae412022+1%1975
Red-eyed VireoVireonidae412022-24%1975
Cedar WaxwingBombycillidae402022-4%1975
Yellow-bellied SapsuckerPicidae382022+800%1990
Gray CatbirdMimidae362022+393%1975
American GoldfinchFringillidae332022+55%1975
Mourning DoveColumbidae292022+709%1976
Common YellowthroatParulidae292022+108%1975
Chipping SparrowPasserellidae272022+17%1975
American RedstartParulidae212022+139%1987
Tree SwallowHirundinidae202022+117%1987
Northern CardinalCardinalidae192022+162%1975
Northern House WrenTroglodytidae192022+36%1975
Indigo BuntingCardinalidae182022-39%1975
OvenbirdParulidae182022+657%1976
Barn SwallowHirundinidae172022-67%1975
House FinchFringillidae152022+12%1989
Black-capped ChickadeeParidae142022+135%1987
Swamp SparrowPasserellidae142022+186%1990
Common GrackleIcteridae132022-42%1975
White-breasted NuthatchSittidae132022+600%1993
Field SparrowPasserellidae112022-34%1975
Yellow WarblerParulidae112022+50%1975
Chestnut-sided WarblerParulidae102022+240%1975
Eastern PhoebeTyrannidae92022+25%1975
Blue JayCorvidae82022-41%1975
Eastern TowheePasserellidae82022+0%1975
VeeryTurdidae82022+100%1975
Black-billed CuckooCuculidae82022+120%1988
Tufted TitmouseParidae82022+250%1989
Northern Rough-winged SwallowHirundinidae82022+175%2005
Baltimore OrioleIcteridae72022+46%1975
Bank SwallowHirundinidae72022+60%1976
Downy WoodpeckerPicidae72022+0%1988
Rose-breasted GrosbeakCardinalidae62022-29%1975
Eastern KingbirdTyrannidae52022+150%1975

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