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

Greater Yellowlegs Population Trend in Alaska

All statesShorebirds

Greater Yellowlegs in Alaska has increased: up 32% on the route-weighted index since 1982.

+32%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 →
66Routes 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 Greater 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 Greater Yellowlegs in Alaska. See the full index history below.

Greater Yellowlegs Population Forecast in Alaska

If the recent trend holds, Greater Yellowlegs in Alaska is projected to stay roughly flat through 2029, near 0.95 (95% range 0.28–1.6). A 5-year backtest shows a typical error of ±45.4%, with 100% of held-out values landing inside the 95% band.

-1%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 →
0.95Projected 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 →
0.28–1.695% 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 →
±45.4%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, Greater Yellowlegs in Alaska is projected to stay roughly flat through 2029, near 0.95 (95% range 0.28–1.6). A 5-year backtest shows a typical error of ±45.4%, with 100% of held-out values landing inside the 95% band.19752029
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 →
20250.950.291.6
20260.950.291.6
20270.950.281.6
20280.950.281.6
20290.950.281.6

Greater Yellowlegs Survey Routes in Alaska

Routes recording Greater 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 →
Goodnews Bay2320051999
Togiak River1920051994
Cordova1320241983
King Salmon1320241993
Monahan1219931992
Yakutat (Short)1219841984
Cold Bay1220242006
Sourdough1020181998
Paxson Lake819931991
Kanektok Riv820051995
Kalifonsky720231982
Mud River720041994
Hather Creek620041994
Dillingham620191993
Copper River620111993
Dillingham (Short)619841984
Yakutat620241993
Katmai N.P.520221994
Kodiak 2520241985
Chiniak420241985
Chistochina320211998
Zarembo320221993
Ft. Richrdsn320231994
Petersville320231986
Harlequin L.320241993

Greater Yellowlegs Population Trend in Other States

washington

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