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

American Robin Population Trend in Utah

All statesForest birds

American Robin in Utah has edged up: up 11% on the route-weighted index since 1970.

+11%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 →
97Routes 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 American Robin 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 American Robin in Utah. See the full index history below.

American Robin Population Forecast in Utah

If the recent trend holds, American Robin in Utah is projected to rise about 29% by 2029 — from 15 in 2024 to a central estimate of 19 (95% range 11–28). A 5-year backtest shows a typical error of ±33.4%, with 100% of held-out values landing inside the 95% band.

+29%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 →
19Projected 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 →
11–2895% 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 →
±33.4%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, American Robin in Utah is projected to rise about 29% by 2029 — from 15 in 2024 to a central estimate of 19 (95% range 11–28). A 5-year backtest shows a typical error of ±33.4%, 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 →
2025191128
2026191128
2027191128
2028191128
2029191128

American Robin Survey Routes in Utah

Routes recording American Robin 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 →
Gooseberry8620241994
Red Spur Mtn.8120231997
Dixie Nf7720241993
Logan Canyon7720191997
Woodruff7520242002
Ferron6620222000
Uintah Nf6519941987
Kamas6320241997
Hanna5720241997
Grizzly Rdge5620241986
Wasatch Nf5020241988
Lost Cr. Res5020181995
Navajo Lake4720241968
Beck4619871968
Soapstone4420241992
Skyline Driv4320161986
E. Bear Lake4320221995
Heber Mtn.4120241996
Ant Flat-Ogden Can3920231994
La Sal 33920242007
Hyrum3619791975
Randolph3620241992
Beck 23620181990
Hardware Ranch2920231994
Jensen2820241993

American Robin 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.