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

MacGillivray's Warbler In Coastal California

All regionsCoastal CaliforniaForest birds

MacGillivray's Warbler in Coastal California has declined: down 42% on the route-weighted index since 1973.

-42%Since 1973
29Routes In Region
48Years

Notable Signals

No notable trend signals for MacGillivray's Warbler in Coastal California. See the full index history below.

Forecast

If the recent trend holds, MacGillivray's Warbler in Coastal California is projected to stay roughly flat through 2029, near 0.08 (95% range 0.00–0.18). A 5-year backtest shows a typical error of ±134%, with 100% of held-out values landing inside the 95% band.

n/aChange by 2029
0.08Projected 2029 index
0.00–0.1895% range
±134%Backtest error
19712029
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
20250.080.000.18
20260.080.000.18
20270.080.000.18
20280.080.000.18
20290.080.000.18

Routes In Coastal California

Routes recording MacGillivray's Warbler in Coastal California.
ValyermoCALIFORNIA42019
LockwoodCALIFORNIA42018
Orange CoveCALIFORNIA21980
Sawmill MtnCALIFORNIA21977
FallsvaleCALIFORNIA21981
Green ValleyCALIFORNIA22013
Red BluffCALIFORNIA11995
CoalingaCALIFORNIA12007
Lake SuccessCALIFORNIA11981
Big BearCALIFORNIA11983
Point ReyesCALIFORNIA11993
CohassetCALIFORNIA12019
FairfaxCALIFORNIA12012
Carmel ValCALIFORNIA12023
SangerCALIFORNIA12024
JacumbaCALIFORNIA11988
White RiverCALIFORNIA11992
TehamaCALIFORNIA12014
Yolla BollyCALIFORNIA12010
Bartlett SpsCALIFORNIA11977
Waterman GapCALIFORNIA12024
Glen EllenCALIFORNIA11979
Glen Ellen 2CALIFORNIA12008
Angelus OaksCALIFORNIA12017
PescaderoCALIFORNIA12018

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