BirdAnalyst
Species · BCR 10 · BBS 2025 Release · 1966–2024

American Crow In Northern Rockies

All regionsNorthern RockiesGeneralists

American Crow in Northern Rockies has declined: down 42% on the route-weighted index since 1970.

-42%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 →
182Routes In RegionSurvey 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 SignalsNotable 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 Northern Rockies. See the full index history below.

American Crow In Northern Rockies Population Forecast

If the recent trend holds, American Crow in Northern Rockies is projected to fall about 26% by 2029 — from 3.0 in 2024 to a central estimate of 2.2 (95% range 0.16–4.3). A 5-year backtest shows a typical error of ±15%, with 100% of held-out values landing inside the 95% band.

-26%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 →
2.2Projected 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 →
0.16–4.395% 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 →
±15%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 Northern Rockies is projected to fall about 26% by 2029 — from 3.0 in 2024 to a central estimate of 2.2 (95% range 0.16–4.3). A 5-year backtest shows a typical error of ±15%, 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 →
20252.50.384.5
20262.40.324.5
20272.30.274.4
20282.30.224.4
20292.20.164.3

Routes In Northern Rockies

Routes recording American Crow in Northern Rockies.
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 HillMONTANA532024
MadrasOREGON302023
Red RockMONTANA262024
Cape HornIDAHO242021
Hebgen LakeMONTANA222024
St MaryMONTANA202008
Buckskin MtnWYOMING201992
RiversideWYOMING192024
SaveryWYOMING171995
NaplesIDAHO162024
ClintonMONTANA152024
CascadeIDAHO141984
St. Mary 2MONTANA142024
WoodruffUTAH142024
Twin BridgesMONTANA131976
LysiteWYOMING132024
Greenoagh 3MONTANA122018
AlpineWYOMING122024
BoulderWYOMING122024
Salmon RiverIDAHO112021
East Glacier ParkMONTANA102024
BasinWYOMING102009
CoolinIDAHO92024
GreenoughMONTANA92003
KalispellMONTANA82024

Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.