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

Spotted Sandpiper Population Trend in Utah

All statesShorebirds

Spotted Sandpiper in Utah has fallen sharply: down 70% on the route-weighted index since 1973.

-70%Since 1973TrendPercent 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 →
49Routes 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 →
46YearsYears 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 UtahNotable 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 →

Spotted Sandpiper has fallen sharply in Utah: down 70% on the route-weighted index since 1973.

Spotted Sandpiper Population Forecast in Utah

If the recent trend holds, Spotted Sandpiper in Utah is projected to rise about 101% by 2029 — from 0.09 in 2024 to a central estimate of 0.17 (95% range 0.00–0.45). A 5-year backtest shows a typical error of ±140.8%, with 100% of held-out values landing inside the 95% band.

+101%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 →
0.17Projected 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 →
0.00–0.4595% 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 →
±140.8%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 Utah is projected to rise about 101% by 2029 — from 0.09 in 2024 to a central estimate of 0.17 (95% range 0.00–0.45). A 5-year backtest shows a typical error of ±140.8%, with 100% of held-out values landing inside the 95% band.19692029
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 →
20250.190.000.47
20260.190.000.47
20270.180.000.46
20280.180.000.46
20290.170.000.45

Spotted Sandpiper Survey Routes in Utah

Routes recording Spotted Sandpiper in Utah.
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 →
Uintah Nf519941987
Hyrum419751975
Grizzly Rdge419961996
Dixie Nf420211993
Moon Lake319951995
Leamington319921992
Bear River220231992
Callao220182002
Gooseberry220241996
Alton220041997
Moon Lake 2120182018
Neponset Res120121995
Beck119871969
Altonah119821982
Lost Cr. Res120151995
Saleratus Cr120151995
Goshen120132012
Dragerton120082008
E. Bear Lake120191995
Logan Canyon120181997
Beaver120161979
Crawford Mts120152015
Navajo Lake120181969
Boulder120102010
Aneth120101993

Spotted Sandpiper Population Trend in Other States

alabamaalaskaarizonacaliforniacoloradoconnecticutdelawaregeorgiaidahoillinoisindianaiowakansaskentuckymainemarylandmassachusettsmichiganminnesotamissourimontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomaoregonpennsylvaniarhode-islandsouth-dakotatennesseetexasvermontvirginiawashingtonwest-virginiawisconsinwyoming

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