BirdAnalyst
Species · BCR 32 · BBS 2026 Release · 1966–2025

Common Raven In Coastal California

All regionsCoastal CaliforniaGeneralists

Common Raven in Coastal California has surged: up 448% on the route-weighted index since 1970.

+448%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 →
116Routes 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 →

long arc increasecomputed indexTrend sourceWhether the figure is our own computed route-weighted index or an official USGS modeled estimate. The current build labels every trend as computed.Full methodology →

Common Raven has surged in Coastal California: up 448% on the route-weighted index since 1970.

Common Raven In Coastal California Population Forecast

If the recent trend holds, Common Raven in Coastal California is projected to stay roughly flat through 2030, near 20 (95% range 16–25). A 5-year backtest shows a typical error of ±14.4%, with 80% of held-out values landing inside the 95% band.

+9%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 →
20Projected 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 →
16–2595% 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 →
±14.4%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, Common Raven in Coastal California is projected to stay roughly flat through 2030, near 20 (95% range 16–25). A 5-year backtest shows a typical error of ±14.4%, 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 →
2026191523
2027191524
2028201524
2029201524
2030201625

Routes In Coastal California

Routes recording Common Raven 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 →
CoyoteCALIFORNIA862025
South LakeCALIFORNIA752006
Carrizo PlnCALIFORNIA702025
VentucopaCALIFORNIA592002
ParkfieldCALIFORNIA522025
Lockwood ValCALIFORNIA502019
OilfieldsCALIFORNIA452013
MorenoCALIFORNIA452025
Oak GroveCALIFORNIA452025
Ora LomaCALIFORNIA442025
Elizabeth LkCALIFORNIA412016
GreenfieldCALIFORNIA412025
BakersfieldCALIFORNIA392023
Tracy 2CALIFORNIA382024
Buena VistaCALIFORNIA372019
Glen Ellen 3CALIFORNIA322025
JacumbaCALIFORNIA312025
Tres Pinos 2CALIFORNIA312011
CrestonCALIFORNIA292024
AnzaCALIFORNIA272004
TracyCALIFORNIA272009
White RiverCALIFORNIA261992
Harbor Lake 2CALIFORNIA252024
Tres PinosCALIFORNIA242003
Cal Hot SpgsCALIFORNIA242019

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