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

American Wigeon In Great Basin

All regionsGreat BasinWaterfowl

American Wigeon in Great Basin has surged: up 88% on the route-weighted index since 1972.

+88%Since 1972
79Routes In Region
54Years

Notable Signals

long arc increasecomputed index

American Wigeon has surged in Great Basin: up 87% on the route-weighted index since 1972.

Forecast

If the recent trend holds, American Wigeon in Great Basin is projected to fall about 34% by 2029 — from 0.39 in 2024 to a central estimate of 0.25 (95% range 0.00–0.68). A 5-year backtest shows a typical error of ±104.9%, with 100% of held-out values landing inside the 95% band.

-34%Change by 2029
0.25Projected 2029 index
0.00–0.6895% range
±104.9%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
20250.260.000.68
20260.260.000.68
20270.260.000.68
20280.260.000.68
20290.250.000.68

Routes In Great Basin

Routes recording American Wigeon in Great Basin.
Catlow RimOREGON242024
Fish LakeOREGON202024
PrincetonOREGON151981
Chimney Res.NEVADA102017
Iron SpringsIDAHO82024
Clear Lk ResCALIFORNIA72001
Gold HillUTAH72015
RimrockWASHINGTON62023
CratersIDAHO51987
MerrillOREGON52005
MadelineCALIFORNIA42011
Iron GateCALIFORNIA41994
Blizzard GapOREGON41994
Warner VallyOREGON42023
LynnUTAH42013
Turnbull NwrWASHINGTON42013
DorrisCALIFORNIA32017
Crowder FlatCALIFORNIA32018
Green Mtn.OREGON31997
DeltaUTAH32005
Bear RiverUTAH32022
NubieberCALIFORNIA22003
IngallsCALIFORNIA22001
LikelyCALIFORNIA22014
MacdoelCALIFORNIA21993

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