BirdAnalyst
Species · BCR 10 · BBS 2025 Release · 1966–2024

American Wigeon In Northern Rockies

All regionsNorthern RockiesWaterfowl

American Wigeon in Northern Rockies has declined: down 46% on the route-weighted index since 1974.

-46%Since 1974
78Routes In Region
51Years

Notable Signals

No notable trend signals for American Wigeon in Northern Rockies. See the full index history below.

Forecast

If the recent trend holds, American Wigeon in Northern Rockies is projected to rise about 168% by 2029 — from 0.20 in 2024 to a central estimate of 0.53 (95% range 0.00–1.2). A 5-year backtest shows a typical error of ±157%, with 100% of held-out values landing inside the 95% band.

+168%Change by 2029
0.53Projected 2029 index
0.00–1.295% range
±157%Backtest error
19712029
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
20250.540.001.3
20260.540.001.2
20270.540.001.2
20280.540.001.2
20290.530.001.2

Routes In Northern Rockies

Routes recording American Wigeon in Northern Rockies.
Saleratus CrUTAH162018
Hayden ValWYOMING131986
RandolphUTAH82021
NaplesIDAHO72024
Crane CreekIDAHO62002
YellowstoneWYOMING62022
Salmon RiverIDAHO51998
Clover CreekOREGON51989
SeedskadeeWYOMING52016
PolsonMONTANA42000
GlenMONTANA42017
Neponset ResUTAH42018
ErvayWYOMING42022
RawlinsWYOMING42006
East Glacier ParkMONTANA32022
RaynesfordMONTANA32024
ChewelahWASHINGTON31990
L Pend O NwrWASHINGTON32016
NowoodWYOMING32024
Elk HornWYOMING32015
ClarkWYOMING31992
DanielWYOMING31988
ShirleyWYOMING32024
BaggsWYOMING31998
MivodenIDAHO21980

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