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

Ring-necked Duck Population Trend in South Dakota

All statesWaterfowl

Ring-necked Duck in South Dakota has increased: up 37% on the route-weighted index since 1998.

+37%Since 1998TrendPercent 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 →
10Routes 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 →
15YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Ring-necked Duck 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 Ring-necked Duck in South Dakota. See the full index history below.

Ring-necked Duck Survey Routes in South Dakota

Routes recording Ring-necked Duck 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 →
Cottonwood920182010
Gettysburg520092009
Pioneer220212021
Britton220232019
Howard120012001
White Lake120112010
Reva119931993
Volga120031995
Raymond120132006
Long Lake120121998

Ring-necked Duck Population Trend in Other States

alabamaalaskaarizonacaliforniacoloradoidahoiowamainemichiganminnesotamontananebraskanevadanew-hampshirenew-yorknorth-dakotaohiooregonutahvermontwashingtonwisconsinwyoming

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