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Species · Pennsylvania · BBS 2025 Release · 1966–2024

Canada Warbler Population Trend in Pennsylvania

All statesForest birds

Canada Warbler in Pennsylvania has increased: up 46% on the route-weighted index since 1968.

+46%Since 1968
60Routes In State
58Years

Notable Canada Warbler Trends in Pennsylvania

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

Canada Warbler Population Forecast in Pennsylvania

If the recent trend holds, Canada Warbler in Pennsylvania is projected to rise about 16% by 2029 — from 0.26 in 2024 to a central estimate of 0.30 (95% range 0.15–0.44). A 5-year backtest shows a typical error of ±37.6%, with 100% of held-out values landing inside the 95% band.

+16%Change by 2029
0.30Projected 2029 index
0.15–0.4495% range
±37.6%Backtest error
19662029
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
20250.290.150.43
20260.290.150.43
20270.290.150.44
20280.300.150.44
20290.300.150.44

Canada Warbler Survey Routes in Pennsylvania

Routes recording Canada Warbler in Pennsylvania.
Marsh Hill520241983
Starlight419921978
Broad Mtn.420241994
Duboistown420241987
Ansonia320232004
Poyntelle320241973
N Washington219781978
N Pine Grove220221970
Starlight 2220002000
Rothrock Sf220181992
Roulette220111972
Little Marsh219941994
Ralston219721972
Hop Bottom220061967
Munson220231987
New Ringgold219661966
Sproul Sf-A220242002
Ltl Pine Cr220241992
Harmonsburg119961994
Ellenton120241984
Whig Hill120011998
Akeley119711967
Teepleville119881974
Sigel120102002
Lynch119981969

Canada Warbler Population Trend in Other States

connecticutgeorgiaindianamainemarylandmassachusettsmichiganminnesotanew-hampshirenew-jerseynew-yorknorth-carolinaohiorhode-islandtennesseevermontvirginiawest-virginiawisconsin

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