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

Black-necked Stilt Population Trend in Washington

All statesShorebirds

Black-necked Stilt in Washington has surged: up 301% on the route-weighted index since 1989.

+301%Since 1989
9Routes In State
25Years

Notable Black-necked Stilt Trends in Washington

long arc increasecomputed index

Black-necked Stilt has surged in Washington: up 301% on the route-weighted index since 1989.

Black-necked Stilt Population Forecast in Washington

If the recent trend holds, Black-necked Stilt in Washington is projected to fall about 74% by 2026 — from 0.58 in 2021 to a central estimate of 0.15 (95% range 0.00–0.36). A 5-year backtest shows a typical error of ±98.5%, with 80% of held-out values landing inside the 95% band.

-74%Change by 2026
0.15Projected 2026 index
0.00–0.3695% range
±98.5%Backtest error
19842026
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
20220.140.000.35
20230.140.000.35
20240.140.000.36
20250.140.000.36
20260.150.000.36

Black-necked Stilt Survey Routes in Washington

Routes recording Black-necked Stilt in Washington.
Columbia Nwr4020211992
Othello219911987
Moses Lake220082000
Mesa220051994
Potholes220192007
Brewster120181987
Harrington119841984
Reardan120092009
Wapato119901990

Black-necked Stilt Population Trend in Other States

alabamaarizonaarkansascaliforniacoloradodelawarefloridageorgiaidahoillinoiskansaslouisianamarylandmississippimissourimontananebraskanevadanew-mexiconorth-carolinaoklahomaoregonsouth-carolinasouth-dakotatennesseetexasutahwyoming

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