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

Cooper's Hawk Population Trend in Vermont

All statesGeneralists

Cooper's Hawk in Vermont has edged down: down 13% on the route-weighted index since 1973.

-13%Since 1973TrendPercent 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 →
17Routes 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 →
25YearsYears 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 VermontNotable 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 Vermont. See the full index history below.

Cooper's Hawk Population Forecast in Vermont

If the recent trend holds, Cooper's Hawk in Vermont is projected to rise about 13% by 2027 — from 0.05 in 2022 to a central estimate of 0.06 (95% range 0.01–0.11). A 5-year backtest shows a typical error of ±26.1%, with 100% of held-out values landing inside the 95% band.

+13%Change by 2027TrendPercent 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 2027 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →
0.01–0.1195% 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 →
±26.1%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 Vermont is projected to rise about 13% by 2027 — from 0.05 in 2022 to a central estimate of 0.06 (95% range 0.01–0.11). A 5-year backtest shows a typical error of ±26.1%, with 100% of held-out values landing inside the 95% band.19672027
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 →
20230.060.010.12
20240.060.010.11
20250.060.010.11
20260.060.010.11
20270.060.010.11

Cooper's Hawk Survey Routes in Vermont

Routes recording Cooper's Hawk in Vermont.
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 →
S Wallingfrd219991999
Marlboro119671967
North Pownal120111972
Stratton119771977
Landgrove120071973
Gaysville119891989
Shaftsbury120041989
W Rutland119931993
Middlesex120141985
East Calais120222022
Newbury119961996
Hardwick119771977
Greensboro120172016
Fletcher119971973
Hinesburg119801980
Colchester120172017
Grand Isle119991993

Cooper's Hawk Population Trend in Other States

alabamaarizonaarkansascaliforniacoloradoconnecticutdelawarefloridageorgiaidahoillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomaoregonpennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasutahvirginiawashingtonwest-virginiawisconsinwyoming

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