BirdAnalyst
Species · Utah · BBS 2026 Release · 1966–2025

Common Raven Population Trend in Utah

All statesGeneralists

Common Raven in Utah has surged: up 261% on the route-weighted index since 1970.

+261%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 →
114Routes 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 →
57YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Common Raven 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 →

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 →

Common Raven has surged in Utah: up 260% on the route-weighted index since 1970.

Common Raven Population Forecast in Utah

If the recent trend holds, Common Raven in Utah is projected to rise about 18% by 2030 — from 15 in 2025 to a central estimate of 17 (95% range 8.2–27). A 5-year backtest shows a typical error of ±22%, with 100% of held-out values landing inside the 95% band.

+18%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 →
17Projected 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 →
8.2–2795% 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 →
±22%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, Common Raven in Utah is projected to rise about 18% by 2030 — from 15 in 2025 to a central estimate of 17 (95% range 8.2–27). A 5-year backtest shows a typical error of ±22%, with 100% of held-out values landing inside the 95% band.19682030
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 →
2026177.526
2027177.726
2028177.926
2029178.026
2030178.227

Common Raven Survey Routes in Utah

Routes recording Common Raven 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 →
Fairfield8020241987
Newcastle7020251997
Leamington6320171992
Timpie Spg5420031978
Promontory5120251969
Bicknell4920251997
Stock Res3920211986
Iron Springs 23920252024
Clive3820212001
Wellington 33620252012
Monticello3620251998
Snowville3420251999
Grantsville3120252001
Salt Springs2920251986
Pine Creek2920251998
Beryl2620251987
Blanding2620251987
Goshen2520251969
Dragerton2520251970
Iron Springs2520231979
Lynn2520251982
Westwater2520251997
Delta2220251988
Gold Hill2120251987
Gandy2120151997

Common Raven Population Trend in Other States

alaskaarizonacaliforniacoloradoconnecticutgeorgiaidahokentuckymainemarylandmassachusettsmichiganminnesotamontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomaoregonpennsylvaniarhode-islandsouth-carolinatennesseetexasvermontvirginiawashingtonwest-virginiawisconsinwyoming

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