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Species · Massachusetts · BBS 2025 Release · 1966–2024

Eastern Wood-Pewee Population Trend in Massachusetts

All statesAerial insectivores

Eastern Wood-Pewee in Massachusetts has risen sharply: up 66% on the route-weighted index since 1968.

+66%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 →
32Routes 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 MassachusettsNotable signalsLong-arc shifts the engine flags automatically — sustained declines or increases large enough to stand out from year-to-year noise.Full methodology →

long arc increasecomputed indexTrend sourceWhether the figure is our own computed route-weighted index or an official USGS modeled estimate. The current build labels every trend as computed.Full methodology →

Eastern Wood-Pewee has risen sharply in Massachusetts: up 66% on the route-weighted index since 1968.

Eastern Wood-Pewee Population Forecast in Massachusetts

If the recent trend holds, Eastern Wood-Pewee in Massachusetts is projected to fall about 20% by 2029 — from 5.1 in 2024 to a central estimate of 4.1 (95% range 2.7–5.4). A 5-year backtest shows a typical error of ±19.8%, with 80% of held-out values landing inside the 95% band.

-20%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 →
4.1Projected 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 →
2.7–5.495% 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 →
±19.8%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 Massachusetts is projected to fall about 20% by 2029 — from 5.1 in 2024 to a central estimate of 4.1 (95% range 2.7–5.4). A 5-year backtest shows a typical error of ±19.8%, with 80% 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 →
20254.02.75.4
20264.02.75.4
20274.02.75.4
20284.02.75.4
20294.12.75.4

Eastern Wood-Pewee Survey Routes in Massachusetts

Routes recording Eastern Wood-Pewee in Massachusetts.
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 →
Belchertown1420241967
N. Andover1120241995
N Orange1020241968
Ware River920221993
S Barre820241969
Chesterfield820241967
Chilmark719831969
Maynard720221967
Sheffield720221969
Cape Cod Ns620071989
Prattville520191966
E Pepperell519941966
Monterey520242019
Marion420241969
Littleton420241967
Warren420091968
Cummington 2420242015
Hancock420151997
Newburyport320221967
Cummington320141968
Wellfleet 2320242016
Holden320241977
Brockton220191967
Princeton219761969
Warren 2220232010

Eastern Wood-Pewee Population Trend in Other States

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

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