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Species · Montana · BBS 2025 Release · 1966–2024

Green-winged Teal Population Trend in Montana

All statesWaterfowl

Green-winged Teal in Montana has edged down: down 24% on the route-weighted index since 1970.

-24%Since 1970
52Routes In State
48Years

Notable Green-winged Teal Trends in Montana

No notable trend signals for Green-winged Teal in Montana. See the full index history below.

Green-winged Teal Population Forecast in Montana

If the recent trend holds, Green-winged Teal in Montana is projected to fall about 59% by 2029 — from 0.32 in 2024 to a central estimate of 0.13 (95% range 0.00–0.49). A 5-year backtest shows a typical error of ±211.1%, with 100% of held-out values landing inside the 95% band.

-59%Change by 2029
0.13Projected 2029 index
0.00–0.4995% range
±211.1%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
20250.140.000.51
20260.140.000.51
20270.140.000.50
20280.130.000.50
20290.130.000.49

Green-winged Teal Survey Routes in Montana

Routes recording Green-winged Teal in Montana.
Powderville1819791979
Highwood1420161969
Sun River920242024
Hay Lake620191989
Savage619781978
Shawmut620232009
Glasgow519821979
Whitlash520172013
Webster420241980
Westby420242015
Lima420061996
Cleveland320231995
Redstone320132013
Forsyth320052005
Shelby320192015
Sunburst220021976
Virgelle220241993
Harlem219741974
Malta220161975
Glen220211977
Leroy220141988
Jordan220231968
Circle219891989
Flatwillow219941976
Winifred 2220242024

Green-winged Teal Population Trend in Other States

alaskaarizonacaliforniacoloradoidahoillinoisindianaiowakansasmainemichiganminnesotamissourinebraskanevadanew-hampshirenew-mexiconew-yorknorth-dakotaoklahomaoregonpennsylvaniasouth-dakotatexasutahvermontwashingtonwisconsinwyoming

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