BirdAnalyst
Species · BCR 11 · BBS 2025 Release · 1966–2024

Green-winged Teal In Prairie Potholes

All regionsPrairie PotholesWaterfowl

Green-winged Teal in Prairie Potholes has risen sharply: up 70% on the route-weighted index since 1969.

+70%Since 1969
81Routes In Region
57Years

Notable Signals

long arc increasecomputed index

Green-winged Teal has risen sharply in Prairie Potholes: up 70% on the route-weighted index since 1969.

Forecast

If the recent trend holds, Green-winged Teal in Prairie Potholes is projected to fall about 37% by 2029 — from 0.96 in 2024 to a central estimate of 0.60 (95% range 0.08–1.1). A 5-year backtest shows a typical error of ±43.8%, with 100% of held-out values landing inside the 95% band.

-37%Change by 2029
0.60Projected 2029 index
0.08–1.195% range
±43.8%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
20250.580.061.1
20260.590.061.1
20270.590.071.1
20280.600.071.1
20290.600.081.1

Routes In Prairie Potholes

Routes recording Green-winged Teal in Prairie Potholes.
TenneyMINNESOTA92014
Sun RiverMONTANA92024
Danzig 2NORTH-DAKOTA82024
FormanNORTH-DAKOTA72023
HowardSOUTH-DAKOTA72024
GormanSOUTH-DAKOTA71980
Hay LakeMONTANA62019
BuchananNORTH-DAKOTA62024
Wild RoseNORTH-DAKOTA62024
GettysburgSOUTH-DAKOTA62019
GlasgowMONTANA51982
WhitlashMONTANA52017
Lakota 2NORTH-DAKOTA52024
BrittonSOUTH-DAKOTA52008
TracyMINNESOTA42017
WestbyMONTANA42024
WalcottNORTH-DAKOTA42014
LakotaNORTH-DAKOTA42009
ClevelandMONTANA32023
RedstoneMONTANA32013
ShelbyMONTANA32019
SydneyNORTH-DAKOTA31980
WebsterNORTH-DAKOTA32024
NilesNORTH-DAKOTA32024
ReganNORTH-DAKOTA32019

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