BirdAnalyst
Species · BCR 10 · BBS 2026 Release · 1966–2025

American Crow In Northern Rockies

All regionsNorthern RockiesGeneralists

American Crow in Northern Rockies has declined: down 39% on the route-weighted index since 1970.

-39%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 →
183Routes 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 →
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 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 23% by 2030 — from 2.9 in 2025 to a central estimate of 2.2 (95% range 0.16–4.3). A 5-year backtest shows a typical error of ±16%, with 100% of held-out values landing inside the 95% band.

-23%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 →
2.2Projected 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 →
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 →
±16%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 23% by 2030 — from 2.9 in 2025 to a central estimate of 2.2 (95% range 0.16–4.3). A 5-year backtest shows a typical error of ±16%, with 100% 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 →
20262.40.374.5
20272.40.324.4
20282.30.274.4
20292.30.214.3
20302.20.164.3

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 →
Red RockMONTANA632025
NaplesIDAHO292025
Cape HornIDAHO242021
St MaryMONTANA202008
Buckskin MtnWYOMING201992
ChestnutMONTANA192025
BoulderWYOMING192025
ClintonMONTANA182025
Hebgen LakeMONTANA182025
SaveryWYOMING171995
AlpineWYOMING152025
CascadeIDAHO141984
Twin BridgesMONTANA131976
PhilipsburgMONTANA132025
LysiteWYOMING132024
ChallisIDAHO122025
Greenoagh 3MONTANA122018
Savery 2WYOMING122025
East Glacier ParkMONTANA112025
TwickenhamOREGON112025
Browns ParkCOLORADO102025
WoodruffUTAH102025
LaurierWASHINGTON102025
BasinWYOMING102009
KalispellMONTANA92025

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