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

American Crow Population Trend in Montana

All statesGeneralists

American Crow in Montana has declined: down 36% on the route-weighted index since 1970.

-36%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 →
92Routes 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 Crow 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 Crow in Montana. See the full index history below.

American Crow Population Forecast in Montana

If the recent trend holds, American Crow in Montana is projected to stay roughly flat through 2029, near 3.5 (95% range 1.5–5.6). A 5-year backtest shows a typical error of ±35.9%, with 100% of held-out values landing inside the 95% band.

-9%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 →
3.5Projected 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 →
1.5–5.695% 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 →
±35.9%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 Crow in Montana is projected to stay roughly flat through 2029, near 3.5 (95% range 1.5–5.6). A 5-year backtest shows a typical error of ±35.9%, 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 →
20253.61.65.7
20263.61.65.7
20273.61.55.7
20283.61.55.6
20293.51.55.6

American Crow Survey Routes in Montana

Routes recording American Crow 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 →
Church Hill5320242017
Red Rock2620241973
Hebgen Lake2220242017
St Mary2020081968
Hehn Draw1720242016
Clinton1520241975
St. Mary 21420242009
Twin Bridges1319761968
Cabin Creek1320242018
Greenoagh 31220182013
Miles City1120242016
Redstone1020241968
East Glacier Park1020242015
Custer1020222019
Leroy920241986
Greenough920031996
Kalispell820241968
Elliston820241968
Ninemile820241993
Clyde Park820242021
Heart Butte720242015
Gildford720242015
Lindsay720242015
Two Dot620181976
Chestnut620241968

American Crow 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.