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Species · Wyoming · BBS 2026 Release · 1966–2025

Barrow's Goldeneye Population Trend in Wyoming

All statesWaterfowl

Barrow's Goldeneye in Wyoming has risen sharply: up 66% on the route-weighted index since 1979.

+66%Since 1979TrendPercent 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 →
16Routes 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 →
47YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Barrow's Goldeneye 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 →

long arc increasecomputed indexTrend sourceWhether the figure is our own computed route-weighted index or an official USGS modeled estimate. The current build labels every trend as computed.Full methodology →

Barrow's Goldeneye has risen sharply in Wyoming: up 66% on the route-weighted index since 1979.

Barrow's Goldeneye Population Forecast in Wyoming

If the recent trend holds, Barrow's Goldeneye in Wyoming is projected to stay roughly flat through 2030, near 0.41 (95% range 0.00–1.7). A 5-year backtest shows a typical error of ±1297.3%, with 100% of held-out values landing inside the 95% band.

n/aChange 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 →
0.41Projected 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 →
0.00–1.795% 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 →
±1297.3%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, Barrow's Goldeneye in Wyoming is projected to stay roughly flat through 2030, near 0.41 (95% range 0.00–1.7). A 5-year backtest shows a typical error of ±1297.3%, with 100% of held-out values landing inside the 95% band.19762030
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 →
20260.440.001.7
20270.430.001.7
20280.420.001.7
20290.410.001.7
20300.410.001.7

Barrow's Goldeneye Survey Routes in Wyoming

Routes recording Barrow's Goldeneye 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 →
Hayden Val1919861985
Yellowstone420241987
Ne Entrance320191982
Seedskadee219941993
Soda Lake219961992
Dubois220122012
Bill219991999
Fiddler Lk220241982
Alpine219931993
Wilson219931979
Hunter Peak120252024
Moose120171976
Boulder120092007
Horse Creek120171986
Crowheart119871987
Mammoth120101982

Barrow's Goldeneye Population Trend in Other States

alaskacoloradoidahomontanaoregonwashington

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