BirdAnalyst
Species · BCR 17 · BBS 2026 Release · 1966–2025

Green-winged Teal In Badlands and Prairies

All regionsBadlands and PrairiesWaterfowl

Green-winged Teal in Badlands and Prairies has increased: up 38% on the route-weighted index since 1969.

+38%Since 1969TrendPercent change in the route-weighted abundance index between a smoothed baseline window and the most recent one. It tracks direction, not absolute population.Full methodology →
66Routes In RegionSurvey routesHow many standard-protocol BBS routes contributed counts. More routes means a steadier, better-sampled index; very thin coverage is suppressed.Full methodology →
57YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable SignalsNotable signalsLong-arc shifts the engine flags automatically — sustained declines or increases large enough to stand out from year-to-year noise.Full methodology →

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

Green-winged Teal In Badlands and Prairies Population Forecast

If the recent trend holds, Green-winged Teal in Badlands and Prairies is projected to fall about 51% by 2030 — from 0.24 in 2025 to a central estimate of 0.12 (95% range 0.00–0.41). A 5-year backtest shows a typical error of ±172.6%, with 100% of held-out values landing inside the 95% band.

-51%Change by 2030TrendPercent change in the route-weighted abundance index between a smoothed baseline window and the most recent one. It tracks direction, not absolute population.Full methodology →
0.12Projected 2030 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →
0.00–0.4195% range95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →
±172.6%Backtest errorBacktest errorTypical error when we hold out the most recent years, forecast them, and compare to what actually happened. Lower means a more trustworthy projection.Full methodology →
If the recent trend holds, Green-winged Teal in Badlands and Prairies is projected to fall about 51% by 2030 — from 0.24 in 2025 to a central estimate of 0.12 (95% range 0.00–0.41). A 5-year backtest shows a typical error of ±172.6%, with 100% of held-out values landing inside the 95% band.19672030
Projection of the recent trend (dashed) with 80/95% bands — a projection, not a prediction. Habitat, climate, and land use are not modeled.
YearProjected indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →95% low95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →95% high95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →
20260.130.000.42
20270.120.000.42
20280.120.000.41
20290.120.000.41
20300.120.000.41

Routes In Badlands and Prairies

Routes recording Green-winged Teal in Badlands and Prairies.
Recent countThe raw number of individuals recorded on this route in its most recent survey year. A single-route tally, not a trend.Full methodology →
PowdervilleMONTANA181979
HighwoodMONTANA142016
HardingSOUTH-DAKOTA142025
Caballa CrkWYOMING71992
SavageMONTANA61978
ShawmutMONTANA62023
French CreekSOUTH-DAKOTA61996
GorhamNORTH-DAKOTA51982
BillWYOMING52000
Ft YatesNORTH-DAKOTA41972
OwankaSOUTH-DAKOTA41985
Soda WellWYOMING41994
MayoworthWYOMING42018
BucknumWYOMING42007
ForsythMONTANA32005
RockyfordSOUTH-DAKOTA32010
LacreekSOUTH-DAKOTA32019
PineyWYOMING31987
LeroyMONTANA22014
JordanMONTANA22023
CircleMONTANA21989
Two DotMONTANA22025
FlatwillowMONTANA21994
AlbionMONTANA21982
Hehn DrawMONTANA22024

Source: USGS North American Breeding Bird Survey, retrieved 2026-08-14.