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

Common Raven In Coastal California

All regionsCoastal CaliforniaGeneralists

Common Raven in Coastal California has surged: up 424% on the route-weighted index since 1970.

+424%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 →
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 →

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 424% 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 rise about 39% by 2029 — from 14 in 2024 to a central estimate of 20 (95% range 15–24). A 5-year backtest shows a typical error of ±14.9%, with 80% of held-out values landing inside the 95% band.

+39%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 →
20Projected 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 →
15–2495% 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 →
±14.9%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 rise about 39% by 2029 — from 14 in 2024 to a central estimate of 20 (95% range 15–24). A 5-year backtest shows a typical error of ±14.9%, with 80% 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 →
2025191423
2026191424
2027191524
2028201524
2029201524

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 →
MorenoCALIFORNIA1042024
Carrizo PlnCALIFORNIA822023
South LakeCALIFORNIA752006
VentucopaCALIFORNIA592002
Lockwood ValCALIFORNIA502019
Oak GroveCALIFORNIA482024
OilfieldsCALIFORNIA452013
JacumbaCALIFORNIA442024
Elizabeth LkCALIFORNIA412016
BakersfieldCALIFORNIA392023
Tracy 2CALIFORNIA382024
Buena VistaCALIFORNIA372019
Anza 2CALIFORNIA332024
Tres Pinos 2CALIFORNIA312011
ParkfieldCALIFORNIA292024
CrestonCALIFORNIA292024
AnzaCALIFORNIA272004
TracyCALIFORNIA272009
White RiverCALIFORNIA261992
Harbor Lake 2CALIFORNIA252024
Tres PinosCALIFORNIA242003
Cal Hot SpgsCALIFORNIA242019
MaricopaCALIFORNIA212024
SangerCALIFORNIA202024
CoalingaCALIFORNIA192022

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