BirdAnalyst
Species · Washington · BBS 2025 Release · 1966–2024

Brewer's Blackbird Population Trend in Washington

All statesGeneralists

Brewer's Blackbird in Washington has declined: down 42% on the route-weighted index since 1970.

-42%Since 1970
95Routes In State
56Years

Notable Brewer's Blackbird Trends in Washington

No notable trend signals for Brewer's Blackbird in Washington. See the full index history below.

Brewer's Blackbird Population Forecast in Washington

If the recent trend holds, Brewer's Blackbird in Washington is projected to rise about 63% by 2029 — from 8.7 in 2024 to a central estimate of 14 (95% range 2.6–26). A 5-year backtest shows a typical error of ±84.8%, with 100% of held-out values landing inside the 95% band.

+63%Change by 2029
14Projected 2029 index
2.6–2695% range
±84.8%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
2025153.527
2026153.327
2027153.126
2028142.826
2029142.626

Brewer's Blackbird Survey Routes in Washington

Routes recording Brewer's Blackbird in Washington.
Mesa15120081994
Columbia Nwr12820221992
Bay View11520171993
Harwood9519971993
Othello9119911981
Yakima7320241993
Walla Walla7119931993
Scootney Reservoir7020242009
Wapato6720221971
Potholes6220231996
Nighthawk5520241992
Waitsburg5020041994
Pomona4919991998
Malden3920241998
Ewan 23820242023
Asotin3420241981
Ewan3320191983
Twisp3220241969
Ellensburg2620241981
Chewelah2420211977
Issaquah1919871969
Laurier1820221995
Odessa1720241993
Prescott1520221981
South Elma1420241975

Brewer's Blackbird Population Trend in Other States

arizonacaliforniacoloradoidahoindianamichiganminnesotamontananebraskanevadanew-mexiconorth-dakotaoklahomaoregonsouth-dakotatexasutahwisconsinwyoming

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