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

Franklin's Gull Population Trend in South Dakota

All statesWetland birds

Franklin's Gull in South Dakota has edged down: down 18% on the route-weighted index since 1969.

-18%Since 1969
26Routes In State
50Years

Notable Franklin's Gull Trends in South Dakota

No notable trend signals for Franklin's Gull in South Dakota. See the full index history below.

Franklin's Gull Population Forecast in South Dakota

If the recent trend holds, Franklin's Gull in South Dakota is projected to stay roughly flat through 2029, near 3.1 (95% range 0.00–11). A 5-year backtest shows a typical error of ±92.7%, with 40% of held-out values landing inside the 95% band.

-3%Change by 2029
3.1Projected 2029 index
0.00–1195% range
±92.7%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
20253.20.0012
20263.20.0012
20273.20.0012
20283.10.0011
20293.10.0011

Franklin's Gull Survey Routes in South Dakota

Routes recording Franklin's Gull in South Dakota.
Tripp48820171967
Roswell10020071967
Gettysburg10020231969
Fort Pierre10019981998
Howard6020241970
White Lake5019691967
Chamberlain4420112011
Long Lake3520091970
Lennox2620091967
Turton2620071985
Britton1420211967
Gorman1419981998
Geddes1319881967
Broadland919691969
Raymond720211968
Forbes720241967
Wilmot420241967
Volga320231967
Ft Thompson319901990
Crow Creek220221967
Laplant219901990
Cedar Pass220021973
Lane119771977
Veblen119841967
Conde119841967

Franklin's Gull Population Trend in Other States

californiaidahokansasminnesotamontananebraskanorth-dakotaoregonutahwyoming

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