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

American Robin Population Trend in Montana

All statesForest birds

American Robin in Montana has edged up: up 19% on the route-weighted index since 1970.

+19%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 →
116Routes 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 American Robin Trends in MontanaNotable 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 Montana. See the full index history below.

American Robin Population Forecast in Montana

If the recent trend holds, American Robin in Montana is projected to rise about 27% by 2030 — from 20 in 2025 to a central estimate of 26 (95% range 19–32). A 5-year backtest shows a typical error of ±25.6%, with 40% of held-out values landing inside the 95% band.

+27%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 →
26Projected 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 →
19–3295% 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 →
±25.6%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 Montana is projected to rise about 27% by 2030 — from 20 in 2025 to a central estimate of 26 (95% range 19–32). A 5-year backtest shows a typical error of ±25.6%, with 40% 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 →
2026251932
2027251932
2028251932
2029261932
2030261932

American Robin Survey Routes in Montana

Routes recording American Robin in Montana.
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 →
Red Rock8020251973
Chestnut7620251968
Church Hill6920252017
Pagil Gulch6620252015
Libby Dam6520251979
Reed Point6420251977
Clyde Park5820252018
Freeman Creek5520162015
Sula5220241977
Maynard Coulee5220252017
Hebgen Lake4920252017
Wise River4820251993
Winifred4720232023
Arlee4420251968
Highwood4420251968
Kalispell4020251968
Ninemile4020251993
Woodman3820251968
Painted Rock3820221992
Chinook3620252015
East Glacier Park3520252015
Clinton3320251972
Greenoagh 23320112005
Cramer Creek3120191994
Pryor Mtn.3120251995

American Robin Population Trend in Other States

alabamaalaskaarizonaarkansascaliforniacoloradoconnecticutdelawarefloridageorgiaidahoillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourinebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomaoregonpennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasutahvermontvirginiawashingtonwest-virginiawisconsinwyoming

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