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

Wilson's Warbler In Coastal California

All regionsCoastal CaliforniaForest birds

Wilson's Warbler in Coastal California has surged: up 106% on the route-weighted index since 1971.

+106%Since 1971
77Routes In Region
55Years

Notable Signals

long arc increasecomputed index

Wilson's Warbler has surged in Coastal California: up 106% on the route-weighted index since 1971.

Forecast

If the recent trend holds, Wilson's Warbler in Coastal California is projected to rise about 133% by 2029 — from 1.3 in 2024 to a central estimate of 3.0 (95% range 1.8–4.1). A 5-year backtest shows a typical error of ±73.4%, with 40% of held-out values landing inside the 95% band.

+133%Change by 2029
3.0Projected 2029 index
1.8–4.195% range
±73.4%Backtest error
19692029
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
20252.81.74.0
20262.91.74.0
20272.91.74.1
20282.91.84.1
20293.01.84.1

Routes In Coastal California

Routes recording Wilson's Warbler in Coastal California.
Point ReyesCALIFORNIA442023
PescaderoCALIFORNIA252024
Waterman GapCALIFORNIA112024
Morro BayCALIFORNIA62013
Carmel ValCALIFORNIA62024
AnzaCALIFORNIA61981
CalpellaCALIFORNIA41986
FairfaxCALIFORNIA42024
SisquocCALIFORNIA42014
JacksonCALIFORNIA41986
Foster ParkCALIFORNIA31979
FallsvaleCALIFORNIA31975
Green ValleyCALIFORNIA32023
Lake CachumaCALIFORNIA31974
Glen EllenCALIFORNIA32004
Red BluffCALIFORNIA22024
CoalingaCALIFORNIA22005
CohassetCALIFORNIA22024
Sawmill MtnCALIFORNIA22014
Elizabeth LkCALIFORNIA22015
CrestonCALIFORNIA21983
ShafterCALIFORNIA21973
Gold HillCALIFORNIA22023
Yolla BollyCALIFORNIA22013
Mark WestCALIFORNIA22024

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