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Species · Alaska · BBS 2025 Release · 1966–2024

Hudsonian Godwit Population Trend in Alaska

All statesShorebirds

Hudsonian Godwit in Alaska has fallen sharply: down 53% on the route-weighted index since 1994.

-53%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 →
5Routes 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 Hudsonian Godwit Trends in AlaskaNotable 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 declinecomputed 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 →

Hudsonian Godwit has fallen sharply in Alaska: down 53% on the route-weighted index since 1994.

Hudsonian Godwit Population Forecast in Alaska

If the recent trend holds, Hudsonian Godwit in Alaska is projected to stay roughly flat through 2023, near 0.02 (95% range 0.00–0.07). A 5-year backtest shows a typical error of ±47.7%, with 100% of held-out values landing inside the 95% band.

n/aChange by 2023TrendPercent 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 →
0.02Projected 2023 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →
0.00–0.0795% 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 →
±47.7%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, Hudsonian Godwit in Alaska is projected to stay roughly flat through 2023, near 0.02 (95% range 0.00–0.07). A 5-year backtest shows a typical error of ±47.7%, with 100% of held-out values landing inside the 95% band.19922023
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 →
20190.030.000.07
20200.030.000.07
20210.030.000.07
20220.030.000.07
20230.020.000.07

Hudsonian Godwit Survey Routes in Alaska

Routes recording Hudsonian Godwit in Alaska.
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 →
Gweek River320011994
King Salmon220181994
Anvik River120142014
Tupuknuk119951995
Petersville120101992

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