BirdAnalyst
Species · BCR 22 · BBS 2025 Release · 1966–2024

Tree Swallow In Eastern Tallgrass Prairie

All regionsEastern Tallgrass PrairieAerial insectivores

Tree Swallow in Eastern Tallgrass Prairie has surged: up 940% on the route-weighted index since 1968.

+940%Since 1968
249Routes In Region
58Years

Notable Signals

long arc increasecomputed index

Tree Swallow has surged in Eastern Tallgrass Prairie: up 940% on the route-weighted index since 1968.

Forecast

If the recent trend holds, Tree Swallow in Eastern Tallgrass Prairie is projected to rise about 26% by 2029 — from 1.7 in 2024 to a central estimate of 2.2 (95% range 1.5–2.8). A 5-year backtest shows a typical error of ±23.7%, with 80% of held-out values landing inside the 95% band.

+26%Change by 2029
2.2Projected 2029 index
1.5–2.895% range
±23.7%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
20252.01.32.7
20262.11.42.7
20272.11.42.8
20282.11.42.8
20292.21.52.8

Routes In Eastern Tallgrass Prairie

Routes recording Tree Swallow in Eastern Tallgrass Prairie.
Gretna 2NEBRASKA232023
PrairieburgIOWA162024
MarionOHIO162023
GeneseoILLINOIS152018
JanesvilleILLINOIS142024
SenecaILLINOIS132024
PittsburgKANSAS132012
FairburyILLINOIS122024
West LibertyIOWA112007
StreatorILLINOIS102024
GridleyILLINOIS102024
MelroseIOWA102024
KunkleOHIO102024
KentonOHIO102024
JamestownINDIANA92019
BryantIOWA92024
HudsonIOWA92022
Kings CreekOHIO92015
Le RoyILLINOIS82024
GalvestonINDIANA82024
SextonINDIANA82024
Queen CityMISSOURI82022
HolcombILLINOIS72023
WayneILLINOIS72024
Portage 2INDIANA72023

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