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

Gadwall Population Trend in Wyoming

All statesWaterfowl

Gadwall in Wyoming has surged: up 167% on the route-weighted index since 1971.

+167%Since 1971
67Routes In State
54Years

Notable Gadwall Trends in Wyoming

long arc increasecomputed index

Gadwall has surged in Wyoming: up 167% on the route-weighted index since 1971.

Gadwall Population Forecast in Wyoming

If the recent trend holds, Gadwall in Wyoming is projected to rise about 80% by 2029 — from 0.53 in 2024 to a central estimate of 0.95 (95% range 0.00–2.2). A 5-year backtest shows a typical error of ±155.4%, with 100% of held-out values landing inside the 95% band.

+80%Change by 2029
0.95Projected 2029 index
0.00–2.295% range
±155.4%Backtest error
19682029
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
20250.920.002.2
20260.930.002.2
20270.930.002.2
20280.940.002.2
20290.950.002.2

Gadwall Survey Routes in Wyoming

Routes recording Gadwall in Wyoming.
Rock River9920221991
Rozet1520172017
Brookhurst1120131968
Yellowstone820221987
Seedskadee820161994
Harmony820221982
Clarkelen719751971
Bill719991993
Rawlins 2720172016
Bucknum720241993
Natrona619901969
Sussex620241992
Green River619841977
Wyarno520241975
Kaycee520222022
Sybille Cyn520142014
Hayden Val419861986
Buford420242019
Carter 2420242019
Crowheart420042004
Newcastle420241988
Walcott420211982
Fontenelle320241989
Recluse320221991
Seely319981990

Gadwall Population Trend in Other States

alaskaarizonacaliforniacoloradodelawareidahoillinoisiowakansasmassachusettsmichiganminnesotamissourimontananebraskanevadanew-jerseynew-mexiconew-yorknorth-dakotaoklahomaoregonpennsylvaniarhode-islandsouth-dakotatexasutahvermontwashingtonwisconsin

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