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

Lesser Goldfinch In Coastal California

All regionsCoastal CaliforniaGeneralists

Lesser Goldfinch in Coastal California has surged: up 75% on the route-weighted index since 1970.

+75%Since 1970
116Routes In Region
56Years

Notable Signals

long arc increasecomputed index

Lesser Goldfinch has surged in Coastal California: up 75% on the route-weighted index since 1970.

Forecast

If the recent trend holds, Lesser Goldfinch in Coastal California is projected to stay roughly flat through 2029, near 15 (95% range 10–20). A 5-year backtest shows a typical error of ±20.8%, with 100% of held-out values landing inside the 95% band.

-6%Change by 2029
15Projected 2029 index
10–2095% range
±20.8%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
2025159.920
20261510.020
2027151020
2028151020
2029151020

Routes In Coastal California

Routes recording Lesser Goldfinch in Coastal California.
Jofegan 2CALIFORNIA632024
CohassetCALIFORNIA582024
Gold HillCALIFORNIA582024
FolsomCALIFORNIA562024
Harbor Lake 2CALIFORNIA412024
FallsvaleCALIFORNIA401981
Bartlett SpsCALIFORNIA382018
Mt LagunaCALIFORNIA371987
RumseyCALIFORNIA362008
AuburnCALIFORNIA351980
Red BluffCALIFORNIA332024
Elsinore MtnCALIFORNIA332024
Cuyamaca PkCALIFORNIA312024
ColmaCALIFORNIA301972
PowayCALIFORNIA301980
San YsidroCALIFORNIA282019
Point ReyesCALIFORNIA282023
White RiverCALIFORNIA271992
MorenoCALIFORNIA252024
LockwoodCALIFORNIA242024
Tres Pinos 2CALIFORNIA242011
OrovilleCALIFORNIA232024
PenningtonCALIFORNIA222024
CopperopolisCALIFORNIA222024
TujungaCALIFORNIA212021

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