BirdAnalyst
Species · BCR 16 · BBS 2026 Release · 1966–2025

Spotted Sandpiper In Southern Rockies / Colorado Plateau

All regionsSouthern Rockies / Colorado PlateauShorebirds

Spotted Sandpiper in Southern Rockies / Colorado Plateau has edged down: down 13% on the route-weighted index since 1970.

-13%Since 1970TrendPercent 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 →
126Routes In RegionSurvey routesHow many standard-protocol BBS routes contributed counts. More routes means a steadier, better-sampled index; very thin coverage is suppressed.Full methodology →
57YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable SignalsNotable 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 Southern Rockies / Colorado Plateau. See the full index history below.

Spotted Sandpiper In Southern Rockies / Colorado Plateau Population Forecast

If the recent trend holds, Spotted Sandpiper in Southern Rockies / Colorado Plateau is projected to rise about 27% by 2030 — from 0.31 in 2025 to a central estimate of 0.39 (95% range 0.12–0.67). A 5-year backtest shows a typical error of ±73.7%, with 100% of held-out values landing inside the 95% band.

+27%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 →
0.39Projected 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 →
0.12–0.6795% 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 →
±73.7%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 Southern Rockies / Colorado Plateau is projected to rise about 27% by 2030 — from 0.31 in 2025 to a central estimate of 0.39 (95% range 0.12–0.67). A 5-year backtest shows a typical error of ±73.7%, with 100% of held-out values landing inside the 95% band.19682030
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 →
20260.390.110.67
20270.390.110.67
20280.390.120.67
20290.390.120.67
20300.390.120.67

Routes In Southern Rockies / Colorado Plateau

Routes recording Spotted Sandpiper in Southern Rockies / Colorado Plateau.
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 →
Stillwater Pass 2COLORADO102025
TincupCOLORADO82025
Fox CreekCOLORADO52025
Uintah NfUTAH51994
Pagosa SpgsCOLORADO41973
Stillwater PassCOLORADO42009
RadiumCOLORADO42013
Grizzly RdgeUTAH41996
Dixie NfUTAH42021
TarryallCOLORADO32025
GuffeyCOLORADO31990
Lake CityCOLORADO32003
Marshall PasCOLORADO32014
Moon LakeUTAH31995
Douglas PassCOLORADO22023
BlancaCOLORADO21986
Wray GulchCOLORADO22025
Willow PeakCOLORADO22018
Dolores RivCOLORADO22025
CortezCOLORADO22007
Deadman Rd.COLORADO22016
CokedaleCOLORADO21998
Comanche PkCOLORADO22000
Baxter PassCOLORADO22024
Weston PassCOLORADO22000

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