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

Warbling Vireo Population Trend in Montana

All statesForest birds

Warbling Vireo in Montana has surged: up 121% on the route-weighted index since 1970.

+121%Since 1970
83Routes In State
56Years

Notable Warbling Vireo Trends in Montana

long arc increasecomputed index

Warbling Vireo has surged in Montana: up 121% on the route-weighted index since 1970.

Warbling Vireo Population Forecast in Montana

If the recent trend holds, Warbling Vireo in Montana is projected to stay roughly flat through 2029, near 8.7 (95% range 6.5–11). A 5-year backtest shows a typical error of ±11.1%, with 100% of held-out values landing inside the 95% band.

+9%Change by 2029
8.7Projected 2029 index
6.5–1195% range
±11.1%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
20258.46.311
20268.56.411
20278.66.411
20288.66.511
20298.76.511

Warbling Vireo Survey Routes in Montana

Routes recording Warbling Vireo in Montana.
Clancy5120232015
Fish Creek5020241995
Arlee4320241968
Wise River3820241993
Cramer Creek3420191995
Sula3320241978
Lima3320241994
Pryor Mtn.3320241995
Hebgen Lake3220242017
Logan Pass3220241980
Chestnut3120241968
Red Rock3020241978
Elliston2720241969
East Glacier Park2720242015
Noxon2620231995
Clinton2520241975
Whitefish Lake2320242016
Greenough2120041996
Painted Rock2020221992
Greenoagh 22020112005
Fort Logan1820242018
Woodman1620241968
Philipsburg1520242015
Freeman Creek1520162015
Maynard Coulee1520242017

Warbling Vireo Population Trend in Other States

alabamaalaskaarizonaarkansascaliforniacoloradoconnecticutdelawareidahoillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourinebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomaoregonpennsylvaniarhode-islandsouth-dakotatennesseetexasutahvermontvirginiawashingtonwest-virginiawisconsinwyoming

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