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

Green Heron In Coastal California

All regionsCoastal CaliforniaWetland birds

Green Heron in Coastal California has increased: up 38% on the route-weighted index since 1972.

+38%Since 1972
63Routes In Region
52Years

Notable Signals

No notable trend signals for Green Heron in Coastal California. See the full index history below.

Forecast

If the recent trend holds, Green Heron in Coastal California is projected to rise about 197% by 2029 — from 0.06 in 2024 to a central estimate of 0.19 (95% range 0.00–0.43). A 5-year backtest shows a typical error of ±302.4%, with 100% of held-out values landing inside the 95% band.

+197%Change by 2029
0.19Projected 2029 index
0.00–0.4395% range
±302.4%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
20250.190.000.43
20260.190.000.43
20270.190.000.43
20280.190.000.43
20290.190.000.43

Routes In Coastal California

Routes recording Green Heron in Coastal California.
CohassetCALIFORNIA42018
PowayCALIFORNIA41980
GlennCALIFORNIA42009
Ora LomaCALIFORNIA31974
CalpellaCALIFORNIA21981
Foster ParkCALIFORNIA21981
San YsidroCALIFORNIA21992
HollisterCALIFORNIA21998
Orange CoveCALIFORNIA22011
OnoCALIFORNIA22010
SisquocCALIFORNIA21995
ShafterCALIFORNIA21988
Glen EllenCALIFORNIA22002
Collegeville 2CALIFORNIA22009
Red BluffCALIFORNIA12015
PenningtonCALIFORNIA12004
RumseyCALIFORNIA12007
RiovistaCALIFORNIA11971
CollegevilleCALIFORNIA12002
HughsonCALIFORNIA12005
GravesboroCALIFORNIA11990
Yokohl ValCALIFORNIA11996
Santa YnezCALIFORNIA11977
Harbor LakeCALIFORNIA11981
CoalingaCALIFORNIA12009

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