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Species · Washington · BBS 2025 Release · 1966–2024

Barrow's Goldeneye Population Trend in Washington

All statesWaterfowl

Barrow's Goldeneye in Washington has increased: up 27% on the route-weighted index since 1973.

+27%Since 1973TrendPercent 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 →
13Routes 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 →
40YearsYears 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 WashingtonNotable 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 Barrow's Goldeneye in Washington. See the full index history below.

Barrow's Goldeneye Population Forecast in Washington

If the recent trend holds, Barrow's Goldeneye in Washington is projected to fall about 56% by 2029 — from 0.14 in 2024 to a central estimate of 0.06 (95% range 0.00–0.19). A 5-year backtest shows a typical error of ±68%, with 80% of held-out values landing inside the 95% band.

-56%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 →
0.06Projected 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 →
0.00–0.1995% 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 →
±68%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 Washington is projected to fall about 56% by 2029 — from 0.14 in 2024 to a central estimate of 0.06 (95% range 0.00–0.19). A 5-year backtest shows a typical error of ±68%, with 80% of held-out values landing inside the 95% band.19702029
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 →
20250.070.000.20
20260.060.000.20
20270.060.000.20
20280.060.000.20
20290.060.000.19

Barrow's Goldeneye Survey Routes in Washington

Routes recording Barrow's Goldeneye in Washington.
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 →
Rimrock520241972
Ronald420231973
Laurier420011996
Curlew219941994
Cusick120241982
Leavenworth119951995
Twisp120241970
Omak Creek120242011
No Cascades120191994
Packwood120142002
Moses Coulee120011995
Nighthawk120172009
Tonasket120101985

Barrow's Goldeneye Population Trend in Other States

alaskacoloradoidahomontanaoregonwyoming

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