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

Great-tailed Grackle In Coastal California

All regionsCoastal CaliforniaGeneralists

Great-tailed Grackle in Coastal California has surged: up 12× on the route-weighted index since 2001.

12×Since 2001
36Routes In Region
25Years

Notable Signals

long arc increasecomputed index

Great-tailed Grackle has surged in Coastal California: up 12× on the route-weighted index since 2001.

Forecast

If the recent trend holds, Great-tailed Grackle in Coastal California is projected to rise about 14% by 2029 — from 0.60 in 2024 to a central estimate of 0.68 (95% range 0.21–1.1). A 5-year backtest shows a typical error of ±41.1%, with 100% of held-out values landing inside the 95% band.

+14%Change by 2029
0.68Projected 2029 index
0.21–1.195% range
±41.1%Backtest error
19942029
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
20250.600.141.1
20260.620.161.1
20270.640.181.1
20280.660.201.1
20290.680.211.1

Routes In Coastal California

Routes recording Great-tailed Grackle in Coastal California.
Buena VistaCALIFORNIA82019
MorenoCALIFORNIA72024
OrlandCALIFORNIA72022
Ora LomaCALIFORNIA62024
Orange CoveCALIFORNIA52012
AthloneCALIFORNIA52007
CrestonCALIFORNIA42021
Harbor Lake 2CALIFORNIA42024
PenningtonCALIFORNIA32024
SangerCALIFORNIA32023
Elizabeth LkCALIFORNIA32016
AtwaterCALIFORNIA32007
ZamoraCALIFORNIA32022
Anza 2CALIFORNIA32019
Hollister 2CALIFORNIA32018
Elsinore MtnCALIFORNIA22022
AnzaCALIFORNIA22004
JacumbaCALIFORNIA22024
ArvinCALIFORNIA22022
OrovilleCALIFORNIA22024
Cal Hot SpgsCALIFORNIA22019
Staten Is.CALIFORNIA22023
South LakeCALIFORNIA22006
Jofegan 2CALIFORNIA22024
Red BluffCALIFORNIA12023

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