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Species · Kansas · BBS 2026 Release · 1966–2025

Bald Eagle Population Trend in Kansas

All statesBirds of prey

Bald Eagle in Kansas has surged: up 226% on the route-weighted index since 2002.

+226%Since 2002TrendPercent 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 →
18YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Bald Eagle 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 →

Bald Eagle has surged in Kansas: up 226% on the route-weighted index since 2002.

Bald Eagle Population Forecast in Kansas

If the recent trend holds, Bald Eagle in Kansas is projected to fall about 59% by 2030 — from 0.29 in 2025 to a central estimate of 0.12 (95% range 0.00–0.25). A 5-year backtest shows a typical error of ±84.5%, with 0% of held-out values landing inside the 95% band.

-59%Change by 2030TrendPercent 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 →
0.12Projected 2030 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →
0.00–0.2595% 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 →
±84.5%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, Bald Eagle in Kansas is projected to fall about 59% by 2030 — from 0.29 in 2025 to a central estimate of 0.12 (95% range 0.00–0.25). A 5-year backtest shows a typical error of ±84.5%, with 0% of held-out values landing inside the 95% band.19702030
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 →
20260.110.000.25
20270.110.000.25
20280.110.000.25
20290.120.000.25
20300.120.000.25

Bald Eagle Survey Routes in Kansas

Routes recording Bald Eagle 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 →
Olsburg520252001
Lakin419701970
Pittsburg220072007
Wellington120242024
Dalton120232023
Barclay120212021
Wreford120222022
Ellinor120252025
Reece120232023
Berwet120252025
Trading Post120242011
Solomon120112011
Lincolnville120232023
Goessel120172017
Hanover120172017
Rock Creek 2120252025

Bald Eagle Population Trend in Other States

alabamaalaskaarizonaarkansascaliforniacoloradoconnecticutdelawarefloridageorgiaidahoillinoisindianaiowakentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomaoregonpennsylvaniasouth-carolinasouth-dakotatennesseetexasutahvermontvirginiawashingtonwest-virginiawisconsinwyoming

Source: USGS North American Breeding Bird Survey, retrieved 2026-08-14.