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

Gadwall Population Trend in Nebraska

All statesWaterfowl

Gadwall in Nebraska has declined: down 38% on the route-weighted index since 1969.

-38%Since 1969
15Routes In State
47Years

Notable Gadwall Trends in Nebraska

No notable trend signals for Gadwall in Nebraska. See the full index history below.

Gadwall Population Forecast in Nebraska

If the recent trend holds, Gadwall in Nebraska is projected to stay roughly flat through 2029, near 0.16 (95% range 0.00–0.48). A 5-year backtest shows a typical error of ±412%, with 100% of held-out values landing inside the 95% band.

-7%Change by 2029
0.16Projected 2029 index
0.00–0.4895% range
±412%Backtest error
19672029
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
20250.160.000.49
20260.160.000.48
20270.160.000.48
20280.160.000.48
20290.160.000.48

Gadwall Survey Routes in Nebraska

Routes recording Gadwall in Nebraska.
Piester Lake620161967
Arthur420242022
Crescent Lk420161980
Kennedy420241995
Swan Lake320211983
Agate 2220092009
Oglala Nat. Grass.220151999
Ringgold220052003
Murray Lake220101997
Pine Ridge220002000
Nenzel220212021
Wheeler Co220221982
Table120172007
Gordon120131976
Brownlee120181992

Gadwall Population Trend in Other States

alaskaarizonacaliforniacoloradodelawareidahoillinoisiowakansasmassachusettsmichiganminnesotamissourimontananevadanew-jerseynew-mexiconew-yorknorth-dakotaoklahomaoregonpennsylvaniarhode-islandsouth-dakotatexasutahvermontwashingtonwisconsinwyoming

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