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

Tree Swallow Population Trend in South Dakota

All statesAerial insectivores

Tree Swallow in South Dakota has surged: up 612% on the route-weighted index since 1970.

+612%Since 1970
53Routes In State
56Years

Notable Tree Swallow Trends in South Dakota

long arc increasecomputed index

Tree Swallow has surged in South Dakota: up 612% on the route-weighted index since 1970.

Tree Swallow Population Forecast in South Dakota

If the recent trend holds, Tree Swallow in South Dakota is projected to rise about 140% by 2029 — from 1.5 in 2024 to a central estimate of 3.6 (95% range 0.34–6.9). A 5-year backtest shows a typical error of ±147.8%, with 100% of held-out values landing inside the 95% band.

+140%Change by 2029
3.6Projected 2029 index
0.34–6.995% range
±147.8%Backtest error
19682029
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
20253.30.086.6
20263.40.146.7
20273.50.216.7
20283.50.276.8
20293.60.346.9

Tree Swallow Survey Routes in South Dakota

Routes recording Tree Swallow in South Dakota.
Isabel8820151990
Promise4520151986
Rochford1520181997
Lennox1320231996
Rosebud1320112006
Badlands1320121984
Turton1320232008
Black Fox1120172003
Volga1020241968
Wilmot820241969
Ft Thompson720071977
Roswell620141969
Tripp520241999
Raymond520211984
Volunteer520171981
Cedar Pass520162012
Lacreek520231991
Howard420241990
White Lake420111993
Veblen420231969
Gettysburg420232000
Laplant420112011
Englewood420211994
Lane 2420142000
Geddes320121971

Tree Swallow 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.