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Species · Maine · BBS 2025 Release · 1966–2024

Black-and-white Warbler Population Trend in Maine

All statesForest birds

Black-and-white Warbler in Maine has surged: up 111% on the route-weighted index since 1968.

+111%Since 1968
77Routes In State
58Years

Notable Black-and-white Warbler Trends in Maine

long arc increasecomputed index

Black-and-white Warbler has surged in Maine: up 111% on the route-weighted index since 1968.

Black-and-white Warbler Population Forecast in Maine

If the recent trend holds, Black-and-white Warbler in Maine is projected to rise about 23% by 2029 — from 4.2 in 2024 to a central estimate of 5.1 (95% range 0.79–9.4). A 5-year backtest shows a typical error of ±22.4%, with 100% of held-out values landing inside the 95% band.

+23%Change by 2029
5.1Projected 2029 index
0.79–9.495% range
±22.4%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
20255.10.769.4
20265.10.779.4
20275.10.789.4
20285.10.789.4
20295.10.799.4

Black-and-white Warbler Survey Routes in Maine

Routes recording Black-and-white Warbler in Maine.
Northfield4819811976
Cooper1720211975
East Troy1620191973
Brooks1620191977
Charleston1620191975
Medway1620181976
Hudson1620161973
Harmony1520241967
Hermon1520191966
Seboomook Lk1320141972
Topsfield1219961978
Aurora1120211975
Waite1119771977
Searsport1120242002
Forest Sta1020001966
Stacyville920242021
Bowdoin Ctr820211972
Manchester819951971
Winn820221969
Eastbrook720241971
Grnd Lk Strm720001966
Reeds620241990
Warren619901973
Horse Mtn620111983
Andover620212010

Black-and-white Warbler Population Trend in Other States

alabamaarkansascaliforniaconnecticutdelawaregeorgiaillinoisindianakansaskentuckylouisianamarylandmassachusettsmichiganminnesotamississippimissourinebraskanew-hampshirenew-jerseynew-yorknorth-carolinanorth-dakotaohiooklahomapennsylvaniarhode-islandsouth-carolinatennesseetexasvermontvirginiawest-virginiawisconsinwyoming

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