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

Green-winged Teal Population Trend in North Dakota

All statesWaterfowl

Green-winged Teal in North Dakota has surged: up 160% on the route-weighted index since 1969.

+160%Since 1969
44Routes In State
56Years

Notable Green-winged Teal Trends in North Dakota

long arc increasecomputed index

Green-winged Teal has surged in North Dakota: up 160% on the route-weighted index since 1969.

Green-winged Teal Population Forecast in North Dakota

If the recent trend holds, Green-winged Teal in North Dakota is projected to fall about 35% by 2029 — from 1.7 in 2024 to a central estimate of 1.1 (95% range 0.28–1.9). A 5-year backtest shows a typical error of ±30.5%, with 100% of held-out values landing inside the 95% band.

-35%Change by 2029
1.1Projected 2029 index
0.28–1.995% range
±30.5%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
20251.10.231.9
20261.10.241.9
20271.10.261.9
20281.10.271.9
20291.10.281.9

Green-winged Teal Survey Routes in North Dakota

Routes recording Green-winged Teal in North Dakota.
Danzig 2820242019
Forman720231969
Buchanan620241967
Wild Rose620241982
Gorham519821982
Lakota 2520242010
Walcott420142014
Lakota420091968
Ft Yates419721972
Sydney319801979
Webster320241992
Niles320241992
Regan320191982
Denbigh320151982
Douglas Crk320231982
Edgeley220241980
Kempton219971967
Wimbledon220241996
Horsehead Lk220241980
Bowesmont220141970
Nash220131999
Rolla220241969
Bowman220241970
Bentley220132001
Powers Lake220221980

Green-winged Teal Population Trend in Other States

alaskaarizonacaliforniacoloradoidahoillinoisindianaiowakansasmainemichiganminnesotamissourimontananebraskanevadanew-hampshirenew-mexiconew-yorkoklahomaoregonpennsylvaniasouth-dakotatexasutahvermontwashingtonwisconsinwyoming

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