BirdAnalyst
Species · Indiana · BBS 2025 Release · 1966–2024

Tree Swallow Population Trend in Indiana

All statesAerial insectivores

Tree Swallow in Indiana has surged: up 699% on the route-weighted index since 1976.

+699%Since 1976
67Routes In State
48Years

Notable Tree Swallow Trends in Indiana

long arc increasecomputed index

Tree Swallow has surged in Indiana: up 699% on the route-weighted index since 1976.

Tree Swallow Population Forecast in Indiana

If the recent trend holds, Tree Swallow in Indiana is projected to stay roughly flat through 2029, near 4.4 (95% range 2.4–6.4). A 5-year backtest shows a typical error of ±46.6%, with 80% of held-out values landing inside the 95% band.

+4%Change by 2029
4.4Projected 2029 index
2.4–6.495% range
±46.6%Backtest error
19662029
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
20254.02.06.0
20264.12.16.1
20274.22.26.2
20284.32.36.3
20294.42.46.4

Tree Swallow Survey Routes in Indiana

Routes recording Tree Swallow in Indiana.
Lagrange4720241999
Ellis4220241966
Newberry2020242002
Lakeville1720171993
Belmont1520211983
Cross Plains1120242000
Cyprss1120192007
Indiana Dune1120241993
Jamestown920192003
Galveston820241994
Sexton820242023
Cuba720212017
Portage 2720232005
Berne620242001
Pimento620241998
Spencer620242004
Millersburg620241994
Celestine620241988
Kankakee Sands620242000
Portage620042000
Middlebury520241989
Columbia Cty520231981
W Lafayette520241990
Cumback520171983
Shelbyville420242001

Tree Swallow Population Trend in Other States

alabamaalaskaarizonaarkansascaliforniacoloradoconnecticutdelawarefloridageorgiaidahoillinoisiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomaoregonpennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasutahvermontvirginiawashingtonwest-virginiawisconsinwyoming

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