BirdAnalyst
Species · Maine · BBS 2026 Release · 1966–2025

Spotted Sandpiper Population Trend in Maine

All statesShorebirds

Spotted Sandpiper in Maine has surged: up 91% on the route-weighted index since 1975.

+91%Since 1975TrendPercent 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 →
48Routes 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 →
42YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Spotted Sandpiper Trends in MaineNotable 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 Spotted Sandpiper in Maine. See the full index history below.

Spotted Sandpiper Population Forecast in Maine

If the recent trend holds, Spotted Sandpiper in Maine is projected to fall about 57% by 2030 — from 0.11 in 2025 to a central estimate of 0.05 (95% range 0.00–0.19). A 5-year backtest shows a typical error of ±53.7%, with 100% of held-out values landing inside the 95% band.

-57%Change by 2030TrendPercent 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 →
0.05Projected 2030 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 →
±53.7%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, Spotted Sandpiper in Maine is projected to fall about 57% by 2030 — from 0.11 in 2025 to a central estimate of 0.05 (95% range 0.00–0.19). A 5-year backtest shows a typical error of ±53.7%, with 100% of held-out values landing inside the 95% band.19722030
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 →
20260.060.000.20
20270.060.000.19
20280.050.000.19
20290.050.000.19
20300.050.000.19

Spotted Sandpiper Survey Routes in Maine

Routes recording Spotted Sandpiper in Maine.
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 →
Baxter319841982
Washburn320051980
Greenwood220212021
Harmony219891989
Castine219831983
Aurora220012001
Carrabassett220251987
Charleston220212021
Ft Fairfield220051994
Kittery Pt119761975
Newcastle119821982
Wilson Mills119961993
Nesowadnehun119921990
Turner119721972
Reeds119941994
South Arm119901978
Otisfield Gr119931993
Hartford120191976
Bowdoin Ctr119991999
Manchester119821973
East Troy120181977
Warren119891983
Freedom119781978
Benton119771977
Heron Lake119981983

Spotted Sandpiper Population Trend in Other States

alabamaalaskaarizonacaliforniacoloradoconnecticutdelawaregeorgiaidahoillinoisindianaiowakansaskentuckymarylandmassachusettsmichiganminnesotamissourimontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomaoregonpennsylvaniarhode-islandsouth-dakotatennesseetexasutahvermontvirginiawashingtonwest-virginiawisconsinwyoming

Source: USGS North American Breeding Bird Survey, retrieved 2026-08-14.