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Species · Alaska · BBS 2025 Release · 1966–2024

Lesser Yellowlegs Population Trend in Alaska

All statesShorebirds

Lesser Yellowlegs in Alaska has declined: down 48% on the route-weighted index since 1982.

-48%Since 1982TrendPercent 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 →
83Routes 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 →
44YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Lesser Yellowlegs 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 →

No notable trend signals for Lesser Yellowlegs in Alaska. See the full index history below.

Lesser Yellowlegs Population Forecast in Alaska

If the recent trend holds, Lesser Yellowlegs in Alaska is projected to fall about 24% by 2029 — from 0.90 in 2024 to a central estimate of 0.68 (95% range 0.00–2.2). A 5-year backtest shows a typical error of ±23.9%, with 100% of held-out values landing inside the 95% band.

-24%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 →
0.68Projected 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 →
0.00–2.295% 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 →
±23.9%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, Lesser Yellowlegs in Alaska is projected to fall about 24% by 2029 — from 0.90 in 2024 to a central estimate of 0.68 (95% range 0.00–2.2). A 5-year backtest shows a typical error of ±23.9%, with 100% of held-out values landing inside the 95% band.19682029
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 →
20250.830.002.4
20260.790.002.3
20270.760.002.3
20280.720.002.3
20290.680.002.2

Lesser Yellowlegs Survey Routes in Alaska

Routes recording Lesser Yellowlegs 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 →
Sourdough1620241983
Monahan1020211983
Bear Creek919911986
Mud River920241993
Kenny Lake820041983
Pinoche Tral (Short)819841984
Northway720231989
Gweek River720021994
Tupuknuk719951995
Paxson Lake619971995
Koyukuk Riv.620011993
Kanuti Lake620242006
Lake Louise520141993
Elmendorf (Short)519851984
Petersville520231986
Selawik (Short)519871987
Cantwell420211982
Chena River419881988
Galena (Short)420241985
Mccarthy Rd2419991990
Burma Road420241996
Hather Creek420241993
Yakutat320032001
Nicholai Sl320241993
Kobuk River (Short)319921991

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