BirdAnalyst
Species · BCR 9 · BBS 2025 Release · 1966–2024

Wilson's Phalarope In Great Basin

All regionsGreat BasinShorebirds

Wilson's Phalarope in Great Basin has fallen sharply: down 55% on the route-weighted index since 1971.

-55%Since 1971
104Routes In Region
55Years

Notable Signals

long arc declinecomputed index

Wilson's Phalarope has fallen sharply in Great Basin: down 55% on the route-weighted index since 1971.

Forecast

If the recent trend holds, Wilson's Phalarope in Great Basin is projected to rise about 392% by 2029 — from 0.10 in 2024 to a central estimate of 0.49 (95% range 0.00–1.5). A 5-year backtest shows a typical error of ±405.4%, with 100% of held-out values landing inside the 95% band.

+392%Change by 2029
0.49Projected 2029 index
0.00–1.595% range
±405.4%Backtest error
19692029
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
20250.540.001.5
20260.530.001.5
20270.510.001.5
20280.500.001.5
20290.490.001.5

Routes In Great Basin

Routes recording Wilson's Phalarope in Great Basin.
PromontoryUTAH752016
Catlow RimOREGON602021
Fish LakeOREGON422021
Columbia NwrWASHINGTON222004
DorrisCALIFORNIA202018
Clear Lk ResCALIFORNIA132007
Sand PassNEVADA122006
PrincetonOREGON121985
LeadoreIDAHO112001
Crowder FlatCALIFORNIA102007
LynnUTAH102021
OthelloWASHINGTON101990
Twin ButtesIDAHO81999
Grouse CreekUTAH81983
SquirrelIDAHO71999
NighthawkWASHINGTON72019
MacdoelCALIFORNIA62015
Toiyabe NfNEVADA62003
Bald Mtn.NEVADA61992
Oak CityUTAH62000
Blackft ResIDAHO52016
GardnervilleNEVADA52005
CallaoUTAH52024
BentonCALIFORNIA42016
DuboisIDAHO42024

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