BirdAnalyst
Species · BCR 32 · BBS 2025 Release · 1966–2024

American Crow In Coastal California

All regionsCoastal CaliforniaGeneralists

American Crow in Coastal California has increased: up 38% on the route-weighted index since 1970.

+38%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 →
106Routes 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 Coastal California. See the full index history below.

American Crow In Coastal California Population Forecast

If the recent trend holds, American Crow in Coastal California is projected to rise about 96% by 2029 — from 13 in 2024 to a central estimate of 25 (95% range 8.6–42). A 5-year backtest shows a typical error of ±125.5%, with 20% of held-out values landing inside the 95% band.

+96%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 →
25Projected 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 →
8.6–4295% 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 →
±125.5%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 Crow in Coastal California is projected to rise about 96% by 2029 — from 13 in 2024 to a central estimate of 25 (95% range 8.6–42). A 5-year backtest shows a typical error of ±125.5%, with 20% 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 →
2025258.141
2026258.241
2027258.341
2028258.442
2029258.642

Routes In Coastal California

Routes recording American Crow in Coastal California.
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 →
CaruthersCALIFORNIA641987
GravesboroCALIFORNIA621995
CollegevilleCALIFORNIA572004
Tres Pinos 2CALIFORNIA572011
El ToroCALIFORNIA551999
Harbor Lake 2CALIFORNIA532024
MorenoCALIFORNIA502024
Harbor LakeCALIFORNIA451991
TiptonCALIFORNIA451997
Mark WestCALIFORNIA442024
San YsidroCALIFORNIA422019
LivermoreCALIFORNIA401991
Hollister 2CALIFORNIA402024
HollisterCALIFORNIA362011
Buena VistaCALIFORNIA361999
TracyCALIFORNIA352009
FairfaxCALIFORNIA322024
Carmel ValCALIFORNIA322024
Cp. PendletonCALIFORNIA322004
AtwaterCALIFORNIA322012
Elizabeth LkCALIFORNIA292016
Santa YnezCALIFORNIA272019
Ora LomaCALIFORNIA242024
CoyoteCALIFORNIA232024
CohassetCALIFORNIA222024

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