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

Cooper's Hawk Population Trend in Maine

All statesGeneralists

Cooper's Hawk in Maine has increased: up 33% on the route-weighted index since 1983.

+33%Since 1983TrendPercent 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 →
20Routes 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 →
20YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Cooper's Hawk 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 Cooper's Hawk in Maine. See the full index history below.

Cooper's Hawk Population Forecast in Maine

If the recent trend holds, Cooper's Hawk in Maine is projected to rise about 13% by 2029 — from 0.05 in 2024 to a central estimate of 0.06 (95% range 0.00–0.12). A 5-year backtest shows a typical error of ±39.9%, with 80% of held-out values landing inside the 95% band.

+13%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 →
0.06Projected 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 →
0.00–0.1295% 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 →
±39.9%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, Cooper's Hawk in Maine is projected to rise about 13% by 2029 — from 0.05 in 2024 to a central estimate of 0.06 (95% range 0.00–0.12). A 5-year backtest shows a typical error of ±39.9%, with 80% of held-out values landing inside the 95% band.19722029
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 →
20250.060.000.12
20260.060.000.12
20270.060.000.12
20280.060.000.12
20290.060.000.12

Cooper's Hawk Survey Routes in Maine

Routes recording Cooper's Hawk 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 →
Greenwood219731973
Brownfield 2220112011
Westbrook120142008
Kittery Pt120241995
Newcastle119971997
Reeds120102010
South Arm120091987
East Troy120192019
Harmony120222022
Heron Lake119831983
Hermon120162016
Aurora120162010
Moose River120052005
Carrying Pl120142010
Wytopitlock119971997
Medway120082008
Hudson119931993
Forest Sta119721972
Horse Mtn120092009
Cornville120222012

Cooper's Hawk Population Trend in Other States

alabamaarizonaarkansascaliforniacoloradoconnecticutdelawarefloridageorgiaidahoillinoisindianaiowakansaskentuckylouisianamarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomaoregonpennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasutahvermontvirginiawashingtonwest-virginiawisconsinwyoming

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