BirdAnalyst
Species · BCR 34 · BBS 2026 Release · 1966–2025

American Crow In Sierra Madre Occidental

All regionsSierra Madre OccidentalGeneralists

American Crow in Sierra Madre Occidental has increased: up 34% on the route-weighted index since 1970.

+34%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 →
13Routes 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 →
51YearsYears 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 Sierra Madre Occidental. See the full index history below.

American Crow In Sierra Madre Occidental Population Forecast

If the recent trend holds, American Crow in Sierra Madre Occidental is projected to fall about 12% by 2030 — from 2.0 in 2025 to a central estimate of 1.8 (95% range 0.21–3.3). A 5-year backtest shows a typical error of ±213.3%, with 80% of held-out values landing inside the 95% band.

-12%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 →
1.8Projected 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 →
0.21–3.395% 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 →
±213.3%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 Sierra Madre Occidental is projected to fall about 12% by 2030 — from 2.0 in 2025 to a central estimate of 1.8 (95% range 0.21–3.3). A 5-year backtest shows a typical error of ±213.3%, with 80% 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 →
20261.70.143.3
20271.70.163.3
20281.70.173.3
20291.80.193.3
20301.80.213.3

Routes In Sierra Madre Occidental

Routes recording American Crow in Sierra Madre Occidental.
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 →
AlpineARIZONA272025
WilliamsARIZONA232025
PinetopARIZONA132022
Mormon LakeARIZONA61975
MaineARIZONA32024
Clay SpringARIZONA32014
Skull ValleyARIZONA22009
SprucedaleARIZONA22025
ReserveNEW-MEXICO22025
FlagstaffARIZONA11992
BlueARIZONA11991
Tonto Vill.ARIZONA12010
Happy JackARIZONA12022

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