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Species · Indiana · BBS 2025 Release · 1966–2024

Bell's Vireo Population Trend in Indiana

All statesForest birds

Bell's Vireo in Indiana has surged: up 255% on the route-weighted index since 1975.

+255%Since 1975
18Routes In State
43Years

Notable Bell's Vireo Trends in Indiana

long arc increasecomputed index

Bell's Vireo has surged in Indiana: up 255% on the route-weighted index since 1975.

Bell's Vireo Population Forecast in Indiana

If the recent trend holds, Bell's Vireo in Indiana is projected to rise about 40% by 2029 — from 0.16 in 2024 to a central estimate of 0.23 (95% range 0.10–0.36). A 5-year backtest shows a typical error of ±35.2%, with 80% of held-out values landing inside the 95% band.

+40%Change by 2029
0.23Projected 2029 index
0.10–0.3695% range
±35.2%Backtest error
19692029
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
20250.210.090.34
20260.220.090.35
20270.220.100.35
20280.230.100.35
20290.230.100.36

Bell's Vireo Survey Routes in Indiana

Routes recording Bell's Vireo in Indiana.
Millersburg420141986
Pimento420241990
Wallace220232023
New Castle220222021
Washington120242017
Gary119841984
Hebron119751969
Indian Spgs120232021
Kewanna119931993
Newberry120242010
Kankakee Sands120242002
Fowler120102010
Evansville120191978
Monticello119881988
Cuba120172017
Brazil120242012
Friendswood120242023
Jamestown119911991

Bell's Vireo Population Trend in Other States

arizonaarkansascaliforniacoloradoillinoisiowakansaskentuckymichiganminnesotamissourinebraskanevadanew-mexiconorth-dakotaohiooklahomasouth-dakotatexasutahwisconsin

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