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

Common Goldeneye Population Trend in Washington

All statesWaterfowl

Common Goldeneye in Washington has risen sharply: up 51% on the route-weighted index since 1994.

+51%Since 1994TrendPercent 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 →
11Routes 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 →
25YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Common 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 Common Goldeneye in Washington. See the full index history below.

Common Goldeneye Population Forecast in Washington

If the recent trend holds, Common Goldeneye in Washington is projected to stay roughly flat through 2027, near 0.04 (95% range 0.00–0.10). A 5-year backtest shows a typical error of ±138.4%, with 100% of held-out values landing inside the 95% band.

n/aChange by 2027TrendPercent 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 →
0.04Projected 2027 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →
0.00–0.1095% 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 →
±138.4%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, Common Goldeneye in Washington is projected to stay roughly flat through 2027, near 0.04 (95% range 0.00–0.10). A 5-year backtest shows a typical error of ±138.4%, with 100% of held-out values landing inside the 95% band.19852027
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 →
20230.040.000.09
20240.040.000.09
20250.040.000.10
20260.040.000.10
20270.040.000.10

Common Goldeneye Survey Routes in Washington

Routes recording Common 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 →
Brewster520042004
Laurier220221996
L Pend O Nwr220212021
Cusick120171997
Mazama120012001
Twisp120022002
Nighthawk120132013
Curlew120182012
Glacier120041993
Tonasket120052005
Twin Lakes119851985

Common Goldeneye Population Trend in Other States

alaskacaliforniaidahomainemichiganminnesotamontananew-hampshirenew-yorknorth-dakotavermontwisconsinwyoming

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