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

Warbling Vireo In Coastal California

All regionsCoastal CaliforniaForest birds

Warbling Vireo in Coastal California has surged: up 118% on the route-weighted index since 1970.

+118%Since 1970
79Routes In Region
56Years

Notable Signals

long arc increasecomputed index

Warbling Vireo has surged in Coastal California: up 118% on the route-weighted index since 1970.

Forecast

If the recent trend holds, Warbling Vireo in Coastal California is projected to rise about 76% by 2029 — from 2.9 in 2024 to a central estimate of 5.2 (95% range 3.3–7.0). A 5-year backtest shows a typical error of ±56.3%, with 20% of held-out values landing inside the 95% band.

+76%Change by 2029
5.2Projected 2029 index
3.3–7.095% range
±56.3%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
20255.03.26.8
20265.03.26.9
20275.13.36.9
20285.13.36.9
20295.23.37.0

Routes In Coastal California

Routes recording Warbling Vireo in Coastal California.
Waterman GapCALIFORNIA502024
Point ReyesCALIFORNIA472023
PescaderoCALIFORNIA242024
Carmel ValCALIFORNIA212024
FairfaxCALIFORNIA162024
StonyfordCALIFORNIA102018
OnoCALIFORNIA82011
CalpellaCALIFORNIA71986
Glen EllenCALIFORNIA72004
LockwoodCALIFORNIA62024
Santa YnezCALIFORNIA52019
Mt BaldyCALIFORNIA52024
Bartlett SpsCALIFORNIA52017
Angelus OaksCALIFORNIA52017
Glen Ellen 3CALIFORNIA52024
SisquocCALIFORNIA42014
AdelaidaCALIFORNIA41999
Tres Pinos 2CALIFORNIA42010
RumseyCALIFORNIA32008
AnzaCALIFORNIA31981
SangerCALIFORNIA32021
Elizabeth LkCALIFORNIA31985
Yolla BollyCALIFORNIA32018
ColmaCALIFORNIA21971
Tres PinosCALIFORNIA22001

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