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Species · Utah · BBS 2025 Release · 1966–2024

Wilson's Phalarope Population Trend in Utah

All statesShorebirds

Wilson's Phalarope in Utah has collapsed: down 94% on the route-weighted index since 1985.

-94%Since 1985
19Routes In State
36Years

Notable Wilson's Phalarope Trends in Utah

long arc declinecomputed index

Wilson's Phalarope has collapsed in Utah: down 94% on the route-weighted index since 1985.

Wilson's Phalarope Population Forecast in Utah

If the recent trend holds, Wilson's Phalarope in Utah is projected to rise about 172% by 2029 — from 0.14 in 2024 to a central estimate of 0.37 (95% range 0.00–2.3). A 5-year backtest shows a typical error of ±558.1%, with 100% of held-out values landing inside the 95% band.

+172%Change by 2029
0.37Projected 2029 index
0.00–2.395% range
±558.1%Backtest error
19742029
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
20250.480.002.4
20260.450.002.4
20270.420.002.4
20280.400.002.3
20290.370.002.3

Wilson's Phalarope Survey Routes in Utah

Routes recording Wilson's Phalarope in Utah.
Promontory7520161974
Saleratus Cr1220161997
Lynn1020211992
Neponset Res920181995
Grouse Creek819831983
E. Bear Lake620211999
Oak City620001985
Soapstone520012001
Callao520241992
Bear River420231992
Woodruff320042002
Goshen220242001
Wellington 2220092009
Snowville220222015
Vernal220182003
Heber Mtn.220162004
Gold Hill220181994
Randolph120241992
Shivwitz120212021

Wilson's Phalarope Population Trend in Other States

californiacoloradoidahoillinoisiowakansasminnesotamontananebraskanevadanew-mexiconorth-dakotaoklahomaoregonsouth-dakotatexaswashingtonwisconsinwyoming

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