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

Violet-green Swallow In Northern Rockies

All regionsNorthern RockiesAerial insectivores

Violet-green Swallow in Northern Rockies has held roughly steady: up 9% on the route-weighted index since 1970.

+9%Since 1970
184Routes In Region
56Years

Notable Signals

No notable trend signals for Violet-green Swallow in Northern Rockies. See the full index history below.

Forecast

If the recent trend holds, Violet-green Swallow in Northern Rockies is projected to rise about 49% by 2029 — from 2.9 in 2024 to a central estimate of 4.3 (95% range 1.6–6.9). A 5-year backtest shows a typical error of ±76.9%, with 100% of held-out values landing inside the 95% band.

+49%Change by 2029
4.3Projected 2029 index
1.6–6.995% range
±76.9%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
20254.21.56.8
20264.21.56.8
20274.21.66.9
20284.31.66.9
20294.31.66.9

Routes In Northern Rockies

Routes recording Violet-green Swallow in Northern Rockies.
CoolinIDAHO422024
CusickWASHINGTON402024
ChallisIDAHO392024
CurlewWASHINGTON342013
FontenelleWYOMING332024
DuboisWYOMING262024
Clover CreekOREGON252022
CrowheartWYOMING222016
Willow Creek 2MONTANA212018
GoldenIDAHO172015
RandolphUTAH162024
KellerWASHINGTON152007
MeeteetseWYOMING152024
NezperceIDAHO142012
ChewelahWASHINGTON142021
MooseWYOMING122024
AlpineWYOMING122024
Mtn ViewWYOMING122024
Green RiverWYOMING121984
Hayden ValWYOMING121986
Nezperce NfIDAHO111999
UnityOREGON102023
NorthportWASHINGTON102024
Ne EntranceWYOMING102019
Hunter PeakWYOMING102024

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