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

Vaux's Swift Population Trend in Montana

All statesAerial insectivores

Vaux's Swift in Montana has declined: down 41% on the route-weighted index since 1982.

-41%Since 1982
14Routes In State
39Years

Notable Vaux's Swift Trends in Montana

No notable trend signals for Vaux's Swift in Montana. See the full index history below.

Vaux's Swift Population Forecast in Montana

If the recent trend holds, Vaux's Swift in Montana is projected to stay roughly flat through 2029, near 0.07 (95% range 0.00–0.23). A 5-year backtest shows a typical error of ±261.2%, with 100% of held-out values landing inside the 95% band.

n/aChange by 2029
0.07Projected 2029 index
0.00–0.2395% range
±261.2%Backtest error
19782029
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
20250.070.000.23
20260.070.000.23
20270.070.000.23
20280.070.000.23
20290.070.000.23

Vaux's Swift Survey Routes in Montana

Routes recording Vaux's Swift in Montana.
Inside Road2020122005
Pablo Res.520102010
St Regis420231985
Logan Pass320231980
Woodman319971991
Libby Dam219881984
Kalispell220241980
Fish Creek219951995
Swan Lake220242015
Ninemile120091993
Noxon120212014
Victor120072007
Arlee120221978
Thompson Riv120112007

Vaux's Swift Population Trend in Other States

alaskacaliforniaidahooregonwashington

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