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

Ferruginous Hawk Population Trend in Utah

All statesGeneralists

Ferruginous Hawk in Utah has fallen sharply: down 60% on the route-weighted index since 1979.

-60%Since 1979
44Routes In State
47Years

Notable Ferruginous Hawk Trends in Utah

long arc declinecomputed index

Ferruginous Hawk has fallen sharply in Utah: down 60% on the route-weighted index since 1979.

Ferruginous Hawk Population Forecast in Utah

If the recent trend holds, Ferruginous Hawk in Utah is projected to fall about 100% by 2029 — from 0.32 in 2024 to a central estimate of 0.00 (95% range 0.00–0.88). A 5-year backtest shows a typical error of ±139.7%, with 100% of held-out values landing inside the 95% band.

-100%Change by 2029
0.00Projected 2029 index
0.00–0.8895% range
±139.7%Backtest error
19692029
Projection of the recent trend (dashed) with 80/95% bands — a projection, not a prediction. Habitat, climate, and land use are not modeled.
YearProjected index95% low95% high
20250.000.000.88
20260.000.000.88
20270.000.000.88
20280.000.000.88
20290.000.000.88

Ferruginous Hawk Survey Routes in Utah

Routes recording Ferruginous Hawk in Utah.
Snowville720242018
Beryl620241987
Pine Creek420182003
Salt Springs320191986
Grouse Creek320101983
Timpie Spg220011979
Neponset Res220181997
Dragerton220111989
Lynn220191996
Leamington220162003
Grantsville220222005
Westwater220241997
Jensen220241994
Fish Springs220151989
Cleveland219941994
Wendover119691969
Beck119691969
Saleratus Cr120121998
Notch Peak119921991
Oak City120241974
Goshen120111987
E. Bear Lake120222008
Stock Res120211986
Beaver120131974
Iron Springs120051984

Ferruginous Hawk Population Trend in Other States

arizonacaliforniacoloradoidahokansasmontananebraskanevadanew-mexiconorth-dakotaoklahomaoregonsouth-dakotatexaswashingtonwyoming

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