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

Tricolored Blackbird In Coastal California

All regionsCoastal CaliforniaGeneralists

Tricolored Blackbird in Coastal California has declined: down 48% on the route-weighted index since 1970.

-48%Since 1970
70Routes In Region
56Years

Notable Signals

No notable trend signals for Tricolored Blackbird in Coastal California. See the full index history below.

Forecast

If the recent trend holds, Tricolored Blackbird in Coastal California is projected to rise about 69% by 2029 — from 10 in 2024 to a central estimate of 18 (95% range 0.00–75). A 5-year backtest shows a typical error of ±487.3%, with 100% of held-out values landing inside the 95% band.

+69%Change by 2029
18Projected 2029 index
0.00–7595% range
±487.3%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
2025190.0077
2026190.0076
2027180.0076
2028180.0075
2029180.0075

Routes In Coastal California

Routes recording Tricolored Blackbird in Coastal California.
OnealsCALIFORNIA52902011
RiovistaCALIFORNIA3262024
AtwaterCALIFORNIA2332012
JacumbaCALIFORNIA2001999
Mark WestCALIFORNIA1401992
GreenfieldCALIFORNIA1132024
MorenoCALIFORNIA862017
PolomaCALIFORNIA861995
OrovilleCALIFORNIA802012
WestleyCALIFORNIA702023
CopperopolisCALIFORNIA702022
Gold HillCALIFORNIA651990
BakersfieldCALIFORNIA602019
OilfieldsCALIFORNIA561976
VentucopaCALIFORNIA452002
LockwoodCALIFORNIA452022
Yolla BollyCALIFORNIA432022
AthloneCALIFORNIA412007
South LakeCALIFORNIA402006
ReddingCALIFORNIA381975
ShafterCALIFORNIA371989
CoyoteCALIFORNIA322014
ArvinCALIFORNIA312022
RumseyCALIFORNIA302006
HughsonCALIFORNIA302024

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