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

Eastern Wood-Pewee Population Trend in Maine

All statesAerial insectivores

Eastern Wood-Pewee in Maine has declined: down 38% on the route-weighted index since 1968.

-38%Since 1968TrendPercent 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 →
76Routes 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 →
58YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Eastern Wood-Pewee Trends in MaineNotable 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 Eastern Wood-Pewee in Maine. See the full index history below.

Eastern Wood-Pewee Population Forecast in Maine

If the recent trend holds, Eastern Wood-Pewee in Maine is projected to fall about 55% by 2029 — from 2.1 in 2024 to a central estimate of 0.91 (95% range 0.00–2.2). A 5-year backtest shows a typical error of ±49.7%, with 100% of held-out values landing inside the 95% band.

-55%Change by 2029TrendPercent 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 →
0.91Projected 2029 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →
0.00–2.295% range95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →
±49.7%Backtest errorBacktest errorTypical error when we hold out the most recent years, forecast them, and compare to what actually happened. Lower means a more trustworthy projection.Full methodology →
If the recent trend holds, Eastern Wood-Pewee in Maine is projected to fall about 55% by 2029 — from 2.1 in 2024 to a central estimate of 0.91 (95% range 0.00–2.2). A 5-year backtest shows a typical error of ±49.7%, with 100% of held-out values landing inside the 95% band.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 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →95% low95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →95% high95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →
20251.10.002.4
20261.00.002.4
20270.990.002.3
20280.950.002.3
20290.910.002.2

Eastern Wood-Pewee Survey Routes in Maine

Routes recording Eastern Wood-Pewee in Maine.
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 →
Manchester1319951971
Waite1119771977
Westbrook820241977
Hermon620191967
Harmony520241967
Searsport520242002
Warren419901973
Brooks420191977
Deblois420051967
Charleston420191977
Benedicta420191976
Ludlow419981968
Horse Mtn420111983
Baker Lake420081994
Cornville420242019
Greenwood320241971
Bowdoin Ctr320211972
Freedom320221973
Northfield319811976
Baxter319881977
Winn320221978
Wytopitlock319981976
Medway320161976
Forest Sta319991966
Biddeford220191973

Eastern Wood-Pewee Population Trend in Other States

alabamaarkansasconnecticutdelawarefloridageorgiaillinoisindianaiowakansaskentuckylouisianamarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanew-hampshirenew-jerseynew-yorknorth-carolinanorth-dakotaohiooklahomapennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasvermontvirginiawest-virginiawisconsin

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