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

Upland Sandpiper Population Trend in Illinois

All statesGrassland birds

Upland Sandpiper in Illinois has declined: down 50% on the route-weighted index since 1968.

-50%Since 1968TrendPercent 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 →
53Routes 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 →
55YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Upland Sandpiper Trends in IllinoisNotable 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 Upland Sandpiper in Illinois. See the full index history below.

Upland Sandpiper Population Forecast in Illinois

If the recent trend holds, Upland Sandpiper in Illinois is projected to fall about 58% by 2030 — from 0.33 in 2025 to a central estimate of 0.14 (95% range 0.00–0.50). A 5-year backtest shows a typical error of ±74.9%, with 100% of held-out values landing inside the 95% band.

-58%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 →
0.14Projected 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 →
0.00–0.5095% 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 →
±74.9%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, Upland Sandpiper in Illinois is projected to fall about 58% by 2030 — from 0.33 in 2025 to a central estimate of 0.14 (95% range 0.00–0.50). A 5-year backtest shows a typical error of ±74.9%, with 100% of held-out values landing inside the 95% band.19662030
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 →
20260.140.000.51
20270.140.000.51
20280.140.000.51
20290.140.000.51
20300.140.000.50

Upland Sandpiper Survey Routes in Illinois

Routes recording Upland Sandpiper in Illinois.
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 →
Monticello820251994
Dailey519961967
Bluff Spgs420252007
Pawnee419711967
Waynesville420182005
Buda320231997
Stillwell320251971
Newark220181970
Williamsfld220011971
Cameron220251967
Fairbury220241979
Pontiac220161985
Lake Summerset220182001
Clayton220172017
Harristown220172016
Shannon220182007
Le Roy220252019
Guilford119941994
Mill Creek120191970
Holcomb119841982
Atkinson120241966
Geneseo119861986
Putnam120191973
Compton119951991
Streator120241981

Upland Sandpiper Population Trend in Other States

alaskacoloradoindianaiowakansasmainemarylandmassachusettsmichiganminnesotamissourimontananebraskanew-hampshirenew-jerseynew-yorknorth-dakotaohiooklahomaoregonpennsylvaniarhode-islandsouth-dakotatexasvermontvirginiawest-virginiawisconsinwyoming

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