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

Spotted Sandpiper Population Trend in Iowa

All statesShorebirds

Spotted Sandpiper in Iowa has surged: up 176% on the route-weighted index since 1970.

+176%Since 1970
30Routes In State
37Years

Notable Spotted Sandpiper Trends in Iowa

long arc increasecomputed index

Spotted Sandpiper has surged in Iowa: up 176% on the route-weighted index since 1970.

Spotted Sandpiper Population Forecast in Iowa

If the recent trend holds, Spotted Sandpiper in Iowa is projected to fall about 37% by 2029 — from 0.18 in 2024 to a central estimate of 0.11 (95% range 0.02–0.21). A 5-year backtest shows a typical error of ±47.1%, with 100% of held-out values landing inside the 95% band.

-37%Change by 2029
0.11Projected 2029 index
0.02–0.2195% range
±47.1%Backtest error
19682029
Projection of the recent trend (dashed) with 80/95% bands — a projection, not a prediction. Habitat, climate, and land use are not modeled.
YearProjected index95% low95% high
20250.110.020.20
20260.110.020.20
20270.110.020.20
20280.110.020.20
20290.110.020.21

Spotted Sandpiper Survey Routes in Iowa

Routes recording Spotted Sandpiper in Iowa.
Melrose220122002
Bryant220221974
Dinsdale219831983
Sioux City220241982
Bedford119691969
College Spgs119911991
West Liberty120241979
Cedar Valley119771977
Brooklyn119891974
Burchinal120232023
Red Rock119961996
Panther120151973
Washington120142014
Wales120031992
Prairieburg120151974
Hudson119831983
Kanawha120211991
Zearing119951992
Scranton119761975
Pierson120031995
Washta120102010
Festina120231968
Davis Corner120242024
Garner119811975
Titonka119961981

Spotted Sandpiper Population Trend in Other States

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

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