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Species · Montana · BBS 2025 Release · 1966–2024

American Robin Population Trend in Montana

All statesForest birds

American Robin in Montana has increased: up 26% on the route-weighted index since 1970.

+26%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 →
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 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 22% by 2029 — from 21 in 2024 to a central estimate of 26 (95% range 20–32). A 5-year backtest shows a typical error of ±19.5%, with 80% of held-out values landing inside the 95% band.

+22%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 →
26Projected 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 →
20–3295% 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 →
±19.5%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 22% by 2029 — from 21 in 2024 to a central estimate of 26 (95% range 20–32). A 5-year backtest shows a typical error of ±19.5%, with 80% 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 →
2025262032
2026262032
2027262032
2028262032
2029262032

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 →
Libby Dam7420241979
Chestnut6920241968
Red Rock6720241973
Clyde Park5820242018
Woodman5620241968
Freeman Creek5520162015
Pagil Gulch5520242015
Sula5220241977
Fort Logan4920242018
Winifred4720232023
Maynard Coulee4720242017
Ninemile4520241993
Reed Point4420241977
Philipsburg4420242015
Church Hill4320242017
Hebgen Lake4020242017
Arlee3920241968
Painted Rock3820221992
Kalispell3720241968
Highwood3620241968
Clinton3520241972
St Regis3420241977
Elliston3420241968
Wolf Creek3420222015
Clancy3320232015

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 2026-05-22.