BirdAnalyst
Species · BCR 10 · BBS 2025 Release · 1966–2024

Vaux's Swift In Northern Rockies

All regionsNorthern RockiesAerial insectivores

Vaux's Swift in Northern Rockies has declined: down 49% on the route-weighted index since 1974.

-49%Since 1974
69Routes In Region
52Years

Notable Signals

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

Forecast

If the recent trend holds, Vaux's Swift in Northern Rockies is projected to rise about 23% by 2029 — from 0.14 in 2024 to a central estimate of 0.17 (95% range 0.00–0.51). A 5-year backtest shows a typical error of ±198.4%, with 100% of held-out values landing inside the 95% band.

+23%Change by 2029
0.17Projected 2029 index
0.00–0.5195% range
±198.4%Backtest error
19712029
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
20250.190.000.52
20260.180.000.52
20270.180.000.51
20280.180.000.51
20290.170.000.51

Routes In Northern Rockies

Routes recording Vaux's Swift in Northern Rockies.
Inside RoadMONTANA202012
Baldy MountainIDAHO122015
TwickenhamOREGON102012
CentervilleIDAHO82008
Eagle RockOREGON81971
BridgeportOREGON71999
GrangevilleIDAHO62007
WickiupOREGON62022
UnityOREGON62004
CoolinIDAHO52024
Pablo Res.MONTANA52010
OchocoOREGON52022
DonnellyOREGON52005
Twin LakesWASHINGTON51990
St RegisMONTANA42023
OchocoOREGON41982
TroyOREGON42024
Black Mtn.OREGON42004
Eagle CreekOREGON42022
CusickWASHINGTON42024
WoodmanMONTANA31997
Logan PassMONTANA32023
SpartaOREGON32001
Mount VernonOREGON32018
Howard Mdws.OREGON32007

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