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

Ferruginous Hawk Population Trend in Oklahoma

All statesGeneralists

Ferruginous Hawk in Oklahoma has held roughly steady: up 4% on the route-weighted index since 1975.

+4%Since 1975TrendPercent 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 →
7Routes 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 →
28YearsYears 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 OklahomaNotable 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 Oklahoma. See the full index history below.

Ferruginous Hawk Population Forecast in Oklahoma

If the recent trend holds, Ferruginous Hawk in Oklahoma is projected to stay roughly flat through 2027, near 0.04 (95% range 0.00–0.08). A 5-year backtest shows a typical error of ±39.5%, with 80% of held-out values landing inside the 95% band.

n/aChange 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 →
0.04Projected 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 →
0.00–0.0895% 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 →
±39.5%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, Ferruginous Hawk in Oklahoma is projected to stay roughly flat through 2027, near 0.04 (95% range 0.00–0.08). A 5-year backtest shows a typical error of ±39.5%, with 80% of held-out values landing inside the 95% band.19702027
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 →
20230.040.000.08
20240.040.000.08
20250.040.000.08
20260.040.000.08
20270.040.000.08

Ferruginous Hawk Survey Routes in Oklahoma

Routes recording Ferruginous Hawk in Oklahoma.
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 →
Hardesty219911981
Hooker220112009
Rosston119901990
Felt120221972
Keyes120191998
Eagle City119881970
Tegarden119901990

Ferruginous Hawk Population Trend in Other States

arizonacaliforniacoloradoidahokansasmontananebraskanevadanew-mexiconorth-dakotaoregonsouth-dakotatexasutahwashingtonwyoming

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