BirdAnalyst
Species · Wyoming · BBS 2025 Release · 1966–2024

Blue-winged Teal Population Trend in Wyoming

All statesWaterfowl

Blue-winged Teal in Wyoming has declined: down 27% on the route-weighted index since 1972.

-27%Since 1972TrendPercent 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 →
68Routes In StateSurvey routesHow many standard-protocol BBS routes contributed counts. More routes means a steadier, better-sampled index; very thin coverage is suppressed.Full methodology →
52YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Blue-winged Teal Trends in WyomingNotable 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 Blue-winged Teal in Wyoming. See the full index history below.

Blue-winged Teal Population Forecast in Wyoming

If the recent trend holds, Blue-winged Teal in Wyoming is projected to stay roughly flat through 2029, near 0.21 (95% range 0.00–0.71). A 5-year backtest shows a typical error of ±36.8%, with 100% of held-out values landing inside the 95% band.

+4%Change by 2029TrendPercent 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 →
0.21Projected 2029 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →
0.00–0.7195% 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 →
±36.8%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, Blue-winged Teal in Wyoming is projected to stay roughly flat through 2029, near 0.21 (95% range 0.00–0.71). A 5-year backtest shows a typical error of ±36.8%, with 100% of held-out values landing inside the 95% band.19692029
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 →
20250.220.000.73
20260.220.000.72
20270.220.000.72
20280.210.000.72
20290.210.000.71

Blue-winged Teal Survey Routes in Wyoming

Routes recording Blue-winged Teal in Wyoming.
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 →
Arminto1320042004
Schoonover919861986
Natrona719921979
Bill719981993
Yoder620231980
Anchor620162016
Shirley619981989
Nowood520241996
Newcastle520001990
Caballa Crk520111995
Clarkelen419781977
Pine Tree419801980
Bucknum420191994
Green River419781978
Kaycee420242022
Otto320051972
Wyarno320241975
Rozet319911991
Riverside319971997
Crazy Woman320061993
Boulder320221994
Lusk320151982
Sybille Cyn320121993
Rock River319981993
Ne Entrance219971997

Blue-winged Teal Population Trend in Other States

alabamaalaskaarizonaarkansascaliforniacoloradodelawarefloridaidahoillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanevadanew-hampshirenew-mexiconew-yorknorth-dakotaohiooklahomaoregonpennsylvaniarhode-islandsouth-dakotatennesseetexasutahvermontvirginiawashingtonwest-virginiawisconsin

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