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

Red-tailed Hawk Population Trend in Utah

All statesGeneralists

Red-tailed Hawk in Utah has declined: down 33% on the route-weighted index since 1970.

-33%Since 1970TrendPercent 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 →
112Routes 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 →
56YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Red-tailed Hawk Trends in UtahNotable 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 Red-tailed Hawk in Utah. See the full index history below.

Red-tailed Hawk Population Forecast in Utah

If the recent trend holds, Red-tailed Hawk in Utah is projected to stay roughly flat through 2029, near 1.3 (95% range 0.05–2.5). A 5-year backtest shows a typical error of ±7.3%, with 100% of held-out values landing inside the 95% band.

-8%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 →
1.3Projected 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 →
0.05–2.595% 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 →
±7.3%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, Red-tailed Hawk in Utah is projected to stay roughly flat through 2029, near 1.3 (95% range 0.05–2.5). A 5-year backtest shows a typical error of ±7.3%, with 100% of held-out values landing inside the 95% band.19682029
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 →
20251.30.072.5
20261.30.062.5
20271.30.062.5
20281.30.052.5
20291.30.052.5

Red-tailed Hawk Survey Routes in Utah

Routes recording Red-tailed Hawk in Utah.
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 →
Timpie Spg620031978
Grantsville620242001
Uintah Nf519921987
Vernon520241992
Leamington520171992
Kamas520241998
Wellington 3420242016
Altonah420151972
Aneth420241986
Grouse Creek420101982
Randolph420241992
Shivwitz420241992
Gandy420152001
Fairfield320241987
Blanding320241987
Bear River320222006
Soapstone320241996
Richfield320191994
La Sal319941994
Dixie Nf320241993
Lake Powell320071993
La Sal 2320062003
Goose Creek Mtn.320231997
Snowville320242004
Jericho Junction320241997

Red-tailed Hawk Population Trend in Other States

alabamaalaskaarizonaarkansascaliforniacoloradoconnecticutdelawarefloridageorgiaidahoillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomaoregonpennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasvermontvirginiawashingtonwest-virginiawisconsinwyoming

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