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

Rock Pigeon In Coastal California

All regionsCoastal CaliforniaGeneralists

Rock Pigeon in Coastal California has increased: up 41% on the route-weighted index since 1970.

+41%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 →
96Routes 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 Rock Pigeon in Coastal California. See the full index history below.

Rock Pigeon In Coastal California Population Forecast

If the recent trend holds, Rock Pigeon in Coastal California is projected to fall about 37% by 2030 — from 11 in 2025 to a central estimate of 6.7 (95% range 0.29–13). A 5-year backtest shows a typical error of ±37%, with 80% of held-out values landing inside the 95% band.

-37%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 →
6.7Projected 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 →
0.29–1395% 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 →
±37%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, Rock Pigeon in Coastal California is projected to fall about 37% by 2030 — from 11 in 2025 to a central estimate of 6.7 (95% range 0.29–13). A 5-year backtest shows a typical error of ±37%, 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 →
20266.80.4913
20276.80.4413
20286.80.3913
20296.70.3413
20306.70.2913

Routes In Coastal California

Routes recording Rock Pigeon 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 →
MorenoCALIFORNIA2252025
LivermoreCALIFORNIA1291991
GravesboroCALIFORNIA741995
CordovaCALIFORNIA701981
Mark WestCALIFORNIA632025
HollisterCALIFORNIA612011
Harbor LakeCALIFORNIA441991
AuburnCALIFORNIA401979
El ToroCALIFORNIA391999
CoyoteCALIFORNIA372025
SangerCALIFORNIA362024
VentucopaCALIFORNIA331997
Orange CoveCALIFORNIA252016
Ora LomaCALIFORNIA222025
Hollister 2CALIFORNIA212024
Tracy 2CALIFORNIA212024
TracyCALIFORNIA172009
Cleveland NfCALIFORNIA161997
San YsidroCALIFORNIA152019
OrlandCALIFORNIA152022
PenningtonCALIFORNIA132024
OrovilleCALIFORNIA132025
Carmel ValCALIFORNIA121995
AthloneCALIFORNIA122007
PolomaCALIFORNIA122024

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