BirdAnalyst
Species · Pennsylvania · BBS 2025 Release · 1966–2024

Pine Warbler Population Trend in Pennsylvania

All statesForest birds

Pine Warbler in Pennsylvania has surged: up 904% on the route-weighted index since 1970.

+904%Since 1970
68Routes In State
56Years

Notable Pine Warbler Trends in Pennsylvania

long arc increasecomputed index

Pine Warbler has surged in Pennsylvania: up 904% on the route-weighted index since 1970.

Pine Warbler Population Forecast in Pennsylvania

If the recent trend holds, Pine Warbler in Pennsylvania is projected to fall about 23% by 2029 — from 0.45 in 2024 to a central estimate of 0.35 (95% range 0.24–0.45). A 5-year backtest shows a typical error of ±20.5%, with 60% of held-out values landing inside the 95% band.

-23%Change by 2029
0.35Projected 2029 index
0.24–0.4595% range
±20.5%Backtest error
19672029
Projection of the recent trend (dashed) with 80/95% bands — a projection, not a prediction. Habitat, climate, and land use are not modeled.
YearProjected index95% low95% high
20250.320.220.43
20260.330.230.43
20270.340.230.44
20280.340.240.45
20290.350.240.45

Pine Warbler Survey Routes in Pennsylvania

Routes recording Pine Warbler in Pennsylvania.
Pocono Summit520241967
Clear Spring520241989
Canadensis420241992
Stoneybreak420241992
Wild Creek320231989
Hop Bottom320242019
Virginia319741972
Sproul Sf-A320232005
Teepleville220222004
Sigel219991999
Pocono Summit 2220072007
Rosecrans220221977
Rush220212021
Waller220241978
Millville220181998
Honesdale220241993
Bendersville219921992
St College220241969
Jacobus220221992
Normalville219731972
West Grove219921992
Sproul Sf-B220222016
Ltl Pine Cr220241991
Espyville120222001
Ellenton119971988

Pine Warbler Population Trend in Other States

alabamaarkansasconnecticutdelawarefloridageorgiaillinoisindianakentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourinew-hampshirenew-jerseynew-yorknorth-carolinaohiooklahomarhode-islandsouth-carolinatennesseetexasvermontvirginiawest-virginiawisconsin

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