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

Dickcissel Population Trend in South Dakota

All statesGrassland birds

Dickcissel in South Dakota has declined: down 34% on the route-weighted index since 1969.

-34%Since 1969TrendPercent 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 →
56Routes 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 →
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 Dickcissel Trends in South DakotaNotable 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 Dickcissel in South Dakota. See the full index history below.

Dickcissel Population Forecast in South Dakota

If the recent trend holds, Dickcissel in South Dakota is projected to stay roughly flat through 2029, near 11 (95% range 0.00–27). A 5-year backtest shows a typical error of ±31.1%, with 100% of held-out values landing inside the 95% band.

+1%Change by 2029TrendPercent 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 →
11Projected 2029 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →
0.00–2795% 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 →
±31.1%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, Dickcissel in South Dakota is projected to stay roughly flat through 2029, near 11 (95% range 0.00–27). A 5-year backtest shows a typical error of ±31.1%, with 100% of held-out values landing inside the 95% band.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 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 →
2025110.0027
2026110.0027
2027110.0027
2028110.0027
2029110.0027

Dickcissel Survey Routes in South Dakota

Routes recording Dickcissel in South Dakota.
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 →
Geddes10420231967
Chamberlain8920111967
Howard8220241970
Ft Thompson8120111967
White Lake5920111967
Gettysburg5820231969
Broadland5520171967
Roswell5420141967
Tripp5220241967
Lane 25020142000
Lacreek4920231991
Crow Creek4420231967
Rosebud3220111967
Volga3120241967
Promise2920151971
Lennox2820241967
Owanka2620221967
Lane2219991967
Gorman2020101992
Raymond1920211967
White River1920141994
Volunteer1820191967
Hayes1820241990
Isabel1620132011
Conde1419841967

Dickcissel Population Trend in Other States

alabamaarkansascoloradodelawaregeorgiaillinoisindianaiowakansaskentuckylouisianamarylandmichiganminnesotamississippimissourimontananebraskanew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomapennsylvaniasouth-carolinatennesseetexasvirginiawest-virginiawisconsinwyoming

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