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

Cooper's Hawk Population Trend in Kansas

All statesGeneralists

Cooper's Hawk in Kansas has surged: up 204% on the route-weighted index since 1981.

+204%Since 1981TrendPercent 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 →
38Routes 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 →
34YearsYears 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 KansasNotable 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 →

Cooper's Hawk has surged in Kansas: up 204% on the route-weighted index since 1981.

Cooper's Hawk Population Forecast in Kansas

If the recent trend holds, Cooper's Hawk in Kansas is projected to fall about 19% by 2029 — from 0.19 in 2024 to a central estimate of 0.15 (95% range 0.06–0.25). A 5-year backtest shows a typical error of ±43.5%, with 100% of held-out values landing inside the 95% band.

-19%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 →
0.15Projected 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 →
0.06–0.2595% 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 →
±43.5%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 Kansas is projected to fall about 19% by 2029 — from 0.19 in 2024 to a central estimate of 0.15 (95% range 0.06–0.25). A 5-year backtest shows a typical error of ±43.5%, with 100% of held-out values landing inside the 95% band.19702029
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 →
20250.150.050.24
20260.150.060.24
20270.150.060.24
20280.150.060.24
20290.150.060.25

Cooper's Hawk Survey Routes in Kansas

Routes recording Cooper's Hawk in Kansas.
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 →
Buckeye320141997
Olathe220212004
Beloit 2220172017
Pittsburg220122002
Morehead220162001
Melrose120112004
Galesburg120242010
Humboldt120221987
Lapland120112011
Wellington120222002
Dalton120222022
Coldwater120212001
Ashland120162016
Dover120172007
Barclay120212007
Wreford120241994
Albert120242024
Kanopolis120231970
Gray120182018
Leoville120142004
Grantville120172017
Hanover120142005
Minneapolis120061993
Covert120241997
Phillipsburg120111981

Cooper's Hawk Population Trend in Other States

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

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