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

Ferruginous Hawk Population Trend in Nebraska

All statesGeneralists

Ferruginous Hawk in Nebraska has held roughly steady: down 10% on the route-weighted index since 1981.

-10%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 →
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 →
33YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Ferruginous Hawk Trends in NebraskaNotable 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 Ferruginous Hawk in Nebraska. See the full index history below.

Ferruginous Hawk Population Forecast in Nebraska

If the recent trend holds, Ferruginous Hawk in Nebraska is projected to stay roughly flat through 2029, near 0.08 (95% range 0.00–0.18). A 5-year backtest shows a typical error of ±106.7%, 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 →
0.00–0.1895% 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 →
±106.7%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, Ferruginous Hawk in Nebraska is projected to stay roughly flat through 2029, near 0.08 (95% range 0.00–0.18). A 5-year backtest shows a typical error of ±106.7%, with 100% of held-out values landing inside the 95% band.19712029
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 →
20250.080.000.17
20260.080.000.18
20270.080.000.18
20280.080.000.18
20290.080.000.18

Ferruginous Hawk Survey Routes in Nebraska

Routes recording Ferruginous Hawk in Nebraska.
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 →
Marsland420192018
Crescent Lk320022002
Gordon220061981
Benkelman220192006
Mullen220172017
Kimball120151993
Agate 2120242002
Ringgold120061994
Oglala Nat. Grass.120132000
Murray Lake120242010
Brownlee120022002
Stratton119851985
Berea120191983
Dalton119961987
Champion120182018
Agate119991971
Kennedy119821979

Ferruginous Hawk Population Trend in Other States

arizonacaliforniacoloradoidahokansasmontananevadanew-mexiconorth-dakotaoklahomaoregonsouth-dakotatexasutahwashingtonwyoming

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