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

California Thrasher In Coastal California

All regionsCoastal CaliforniaGeneralists

California Thrasher in Coastal California has edged up: up 15% on the route-weighted index since 1970.

+15%Since 1970
84Routes In Region
56Years

Notable Signals

No notable trend signals for California Thrasher in Coastal California. See the full index history below.

Forecast

If the recent trend holds, California Thrasher in Coastal California is projected to fall about 34% by 2029 — from 3.4 in 2024 to a central estimate of 2.2 (95% range 0.58–3.9). A 5-year backtest shows a typical error of ±34.1%, with 100% of held-out values landing inside the 95% band.

-34%Change by 2029
2.2Projected 2029 index
0.58–3.995% range
±34.1%Backtest error
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 index95% low95% high
20252.30.613.9
20262.30.603.9
20272.20.593.9
20282.20.593.9
20292.20.583.9

Routes In Coastal California

Routes recording California Thrasher in Coastal California.
Elsinore MtnCALIFORNIA412024
Lake CachumaCALIFORNIA372016
Cuyamaca PkCALIFORNIA272024
RumseyCALIFORNIA192008
Mt BaldyCALIFORNIA182024
Oak GroveCALIFORNIA162024
PowayCALIFORNIA121980
Lockwood ValCALIFORNIA112019
AnzaCALIFORNIA112004
ColmaCALIFORNIA101971
JacumbaCALIFORNIA102024
Anza 2CALIFORNIA102024
Cleveland Nf 2CALIFORNIA102022
FallsvaleCALIFORNIA81981
Elizabeth LkCALIFORNIA72016
Yolla BollyCALIFORNIA72024
Hough SpringsCALIFORNIA72007
FolsomCALIFORNIA62024
Mesa GrandeCALIFORNIA62024
GreenfieldCALIFORNIA62024
TomheadCALIFORNIA62011
StonyfordCALIFORNIA62018
Foster ParkCALIFORNIA51994
Green ValleyCALIFORNIA52023
Tres Pinos 2CALIFORNIA52011

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