BirdAnalyst
Species · North Dakota · BBS 2025 Release · 1966–2024

Gadwall Population Trend in North Dakota

All statesWaterfowl

Gadwall in North Dakota has surged: up 267% on the route-weighted index since 1969.

+267%Since 1969
49Routes In State
57Years

Notable Gadwall Trends in North Dakota

long arc increasecomputed index

Gadwall has surged in North Dakota: up 267% on the route-weighted index since 1969.

Gadwall Population Forecast in North Dakota

If the recent trend holds, Gadwall in North Dakota is projected to rise about 17% by 2029 — from 17 in 2024 to a central estimate of 20 (95% range 11–28). A 5-year backtest shows a typical error of ±20.7%, with 100% of held-out values landing inside the 95% band.

+17%Change by 2029
20Projected 2029 index
11–2895% range
±20.7%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
2025191027
2026191027
2027191128
2028191128
2029201128

Gadwall Survey Routes in North Dakota

Routes recording Gadwall in North Dakota.
Niles5120241989
Stanley4120241969
Sheyenne Lk3620241980
Horsehead Lk3320241980
Braddock3220221988
Forman2620241968
Wild Rose2620241982
Danzig 22620242019
Lakota 22520242010
Wimbledon2320241989
Carpio2320231969
Bowman2320241969
Webster2120241989
Rolla2120241969
Edgeley1920241980
Danzig1720141982
Cooperstown1720241969
Lakota1720091968
Montpelier1720241995
Sydney1619831967
Buchanan1620241967
Powers Lake1020241980
Regan920221968
Douglas Crk820241982
Lake George720221967

Gadwall Population Trend in Other States

alaskaarizonacaliforniacoloradodelawareidahoillinoisiowakansasmassachusettsmichiganminnesotamissourimontananebraskanevadanew-jerseynew-mexiconew-yorkoklahomaoregonpennsylvaniarhode-islandsouth-dakotatexasutahvermontwashingtonwisconsinwyoming

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