BirdAnalyst
Species · New Hampshire · BBS 2025 Release · 1966–2024

Cooper's Hawk Population Trend in New Hampshire

All statesGeneralists

Cooper's Hawk in New Hampshire has edged up: up 23% on the route-weighted index since 1987.

+23%Since 1987TrendPercent 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 →
16Routes 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 →
23YearsYears 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 New HampshireNotable 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 New Hampshire. See the full index history below.

Cooper's Hawk Population Forecast in New Hampshire

If the recent trend holds, Cooper's Hawk in New Hampshire is projected to stay roughly flat through 2029, near 0.08 (95% range 0.02–0.14). A 5-year backtest shows a typical error of ±95.5%, with 100% of held-out values landing inside the 95% band.

n/aChange 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 →
0.08Projected 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 →
0.02–0.1495% 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 →
±95.5%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 New Hampshire is projected to stay roughly flat through 2029, near 0.08 (95% range 0.02–0.14). A 5-year backtest shows a typical error of ±95.5%, with 100% of held-out values landing inside the 95% band.19742029
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 →
20250.080.010.14
20260.080.020.14
20270.080.020.14
20280.080.020.14
20290.080.020.14

Cooper's Hawk Survey Routes in New Hampshire

Routes recording Cooper's Hawk in New Hampshire.
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 →
Concord220162006
East Kingston220092008
Peterborough120232023
Fitzwilliam120191989
Dover120231992
Epsom120152015
Strafford120182018
Canterbury120082008
Wilmot120222022
Walpole120122012
Lempster119871974
Jefferson Hl119951995
Milan120042004
Stratford119841984
Dixvil Notch120022002
Glen120242024

Cooper's Hawk Population Trend in Other States

alabamaarizonaarkansascaliforniacoloradoconnecticutdelawarefloridageorgiaidahoillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanevadanew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomaoregonpennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasutahvermontvirginiawashingtonwest-virginiawisconsinwyoming

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