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Species · Pennsylvania · BBS 2025 Release · 1966–2024

Prothonotary Warbler Population Trend in Pennsylvania

All statesForest birds

Prothonotary Warbler in Pennsylvania has edged down: down 25% on the route-weighted index since 1989.

-25%Since 1989TrendPercent 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 →
6Routes In StateSurvey routesHow many standard-protocol BBS routes contributed counts. More routes means a steadier, better-sampled index; very thin coverage is suppressed.Full methodology →
14YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Prothonotary Warbler Trends in PennsylvaniaNotable signalsLong-arc shifts the engine flags automatically — sustained declines or increases large enough to stand out from year-to-year noise.Full methodology →

No notable trend signals for Prothonotary Warbler in Pennsylvania. See the full index history below.

Prothonotary Warbler Survey Routes in Pennsylvania

Routes recording Prothonotary Warbler in Pennsylvania.
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 →
Lynch219991969
N Washington219891989
Landisburg120241995
Honesdale119981998
Eldred119751975
Jeannette120232023

Prothonotary Warbler Population Trend in Other States

alabamaarkansasdelawarefloridageorgiaillinoisindianaiowakansaskentuckylouisianamarylandmichiganminnesotamississippimissourinew-jerseynew-yorknorth-carolinaohiooklahomasouth-carolinatennesseetexasvirginiawest-virginiawisconsin

Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.