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

Snowy Egret In Coastal California

All regionsCoastal CaliforniaWetland birds

Snowy Egret in Coastal California has surged: up 138% on the route-weighted index since 1973.

+138%Since 1973
32Routes In Region
53Years

Notable Signals

long arc increasecomputed index

Snowy Egret has surged in Coastal California: up 138% on the route-weighted index since 1973.

Forecast

If the recent trend holds, Snowy Egret in Coastal California is projected to rise about 261% by 2029 — from 0.34 in 2024 to a central estimate of 1.2 (95% range 0.24–2.2). A 5-year backtest shows a typical error of ±194.4%, with 60% of held-out values landing inside the 95% band.

+261%Change by 2029
1.2Projected 2029 index
0.24–2.295% range
±194.4%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
20251.20.172.2
20261.20.192.2
20271.20.212.2
20281.20.222.2
20291.20.242.2

Routes In Coastal California

Routes recording Snowy Egret in Coastal California.
RiovistaCALIFORNIA192007
GlennCALIFORNIA172022
FairfaxCALIFORNIA102024
WestleyCALIFORNIA92021
HughsonCALIFORNIA52018
Cp. PendletonCALIFORNIA42004
Harbor Lake 2CALIFORNIA32022
Staten Is.CALIFORNIA32024
El ToroCALIFORNIA21996
ZamoraCALIFORNIA22023
CoyoteCALIFORNIA22024
PenningtonCALIFORNIA12022
Harbor LakeCALIFORNIA11991
MorenoCALIFORNIA12022
San YsidroCALIFORNIA11989
HollisterCALIFORNIA12001
CoalingaCALIFORNIA12005
Morro BayCALIFORNIA11992
OrlandCALIFORNIA12013
PowayCALIFORNIA11977
VentucopaCALIFORNIA11980
ArvinCALIFORNIA12022
AtwaterCALIFORNIA12012
OrovilleCALIFORNIA12006
TranquillityCALIFORNIA12003

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