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

Wilson's Phalarope Population Trend in Washington

All statesShorebirds

Wilson's Phalarope in Washington has fallen sharply: down 73% on the route-weighted index since 1979.

-73%Since 1979
14Routes In State
36Years

Notable Wilson's Phalarope Trends in Washington

long arc declinecomputed index

Wilson's Phalarope has fallen sharply in Washington: down 73% on the route-weighted index since 1979.

Wilson's Phalarope Population Forecast in Washington

If the recent trend holds, Wilson's Phalarope in Washington is projected to stay roughly flat through 2028, near 0.03 (95% range 0.00–0.29). A 5-year backtest shows a typical error of ±112%, with 100% of held-out values landing inside the 95% band.

n/aChange by 2028
0.03Projected 2028 index
0.00–0.2995% range
±112%Backtest error
19732028
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
20240.050.000.30
20250.040.000.30
20260.040.000.29
20270.040.000.29
20280.030.000.29

Wilson's Phalarope Survey Routes in Washington

Routes recording Wilson's Phalarope in Washington.
Columbia Nwr2220041992
Othello1019901981
Nighthawk720191996
Tonasket420132000
Wilbur319841984
Chewelah319811981
Brewster220181977
Ewan219951995
Moses Coulee219971997
Odessa220072007
Harrington219841981
Warm Beach120021973
Asotin119981998
Keystone120232023

Wilson's Phalarope Population Trend in Other States

californiacoloradoidahoillinoisiowakansasminnesotamontananebraskanevadanew-mexiconorth-dakotaoklahomaoregonsouth-dakotatexasutahwisconsinwyoming

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