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

Redhead Population Trend in South Dakota

All statesWaterfowl

Redhead in South Dakota has fallen sharply: down 66% on the route-weighted index since 1969.

-66%Since 1969
32Routes In State
57Years

Notable Redhead Trends in South Dakota

long arc declinecomputed index

Redhead has fallen sharply in South Dakota: down 66% on the route-weighted index since 1969.

Redhead Population Forecast in South Dakota

If the recent trend holds, Redhead in South Dakota is projected to fall about 24% by 2029 — from 0.82 in 2024 to a central estimate of 0.62 (95% range 0.00–3.2). A 5-year backtest shows a typical error of ±38.6%, with 100% of held-out values landing inside the 95% band.

-24%Change by 2029
0.62Projected 2029 index
0.00–3.295% range
±38.6%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
20250.690.003.2
20260.670.003.2
20270.660.003.2
20280.640.003.2
20290.620.003.2

Redhead Survey Routes in South Dakota

Routes recording Redhead in South Dakota.
Raymond2020211984
Turton2020192019
Forbes1020241967
White Lake920111967
Lacreek920232019
Long Lake820191967
Ottumwa819981998
Veblen720191967
Conde619841967
Cedar Pass619961975
Ardmore520191983
Volga420241969
Britton420221967
Gettysburg420231993
Hayes420082008
Lennox320081969
Pioneer319971993
Lodgepole320102010
Howard220181983
Chamberlain220112010
Cottonwood220241995
Roswell220111967
S. Pioneer220171995
Crow Creek220191973
Wilmot220241969

Redhead Population Trend in Other States

alaskaarizonacaliforniacoloradoidahoiowakansasmichiganminnesotamontananebraskanevadanew-mexiconew-yorknorth-dakotaoklahomaoregontexasutahwashingtonwisconsinwyoming

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