BirdAnalyst
Species · South Dakota · BBS 2025 Release · 1966–2024

Red-winged Blackbird Population Trend in South Dakota

All statesGeneralists

Red-winged Blackbird in South Dakota has declined: down 25% on the route-weighted index since 1969.

-25%Since 1969
65Routes In State
57Years

Notable Red-winged Blackbird Trends in South Dakota

No notable trend signals for Red-winged Blackbird in South Dakota. See the full index history below.

Red-winged Blackbird Population Forecast in South Dakota

If the recent trend holds, Red-winged Blackbird in South Dakota is projected to fall about 26% by 2029 — from 100 in 2024 to a central estimate of 74 (95% range 37–111). A 5-year backtest shows a typical error of ±35.3%, with 20% of held-out values landing inside the 95% band.

-26%Change by 2029
74Projected 2029 index
37–11195% range
±35.3%Backtest error
19672029
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
20257640113
20267639112
20277538112
20287438111
20297437111

Red-winged Blackbird Survey Routes in South Dakota

Routes recording Red-winged Blackbird in South Dakota.
Forbes51220241967
Turton50320241985
Roswell32320141967
Broadland28920171967
Lacreek27020231991
Cedar Pass23520231967
Conde21619841967
Lodgepole19920241990
Long Lake18220191967
White Lake18120111967
Geddes16420231967
Isabel15920151990
Rockyford14420231967
Eagle Butte14020151990
Gettysburg13520231969
Wilmot13220241967
Raymond13020211967
Lane 212720142000
Howard12620241970
Promise12420151971
Crow Creek12120231967
Hayes11820241989
Ottumwa11520221967
Volga11320241967
Volunteer10220191967

Red-winged Blackbird Population Trend in Other States

alabamaalaskaarizonaarkansascaliforniacoloradoconnecticutdelawarefloridageorgiaidahoillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomaoregonpennsylvaniarhode-islandsouth-carolinatennesseetexasutahvermontvirginiawashingtonwest-virginiawisconsinwyoming

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