BirdAnalyst
Species · BCR 16 · BBS 2025 Release · 1966–2024

Violet-green Swallow In Southern Rockies / Colorado Plateau

All regionsSouthern Rockies / Colorado PlateauAerial insectivores

Violet-green Swallow in Southern Rockies / Colorado Plateau has increased: up 36% on the route-weighted index since 1970.

+36%Since 1970
228Routes In Region
56Years

Notable Signals

No notable trend signals for Violet-green Swallow in Southern Rockies / Colorado Plateau. See the full index history below.

Forecast

If the recent trend holds, Violet-green Swallow in Southern Rockies / Colorado Plateau is projected to stay roughly flat through 2029, near 9.7 (95% range 3.8–16). A 5-year backtest shows a typical error of ±37.7%, with 100% of held-out values landing inside the 95% band.

+9%Change by 2029
9.7Projected 2029 index
3.8–1695% range
±37.7%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
20259.63.815
20269.63.815
20279.63.815
20289.63.815
20299.73.816

Routes In Southern Rockies / Colorado Plateau

Routes recording Violet-green Swallow in Southern Rockies / Colorado Plateau.
AspenCOLORADO892024
Dry ParkARIZONA682024
Colona 2COLORADO612021
BufordCOLORADO602024
Dolores RivCOLORADO592024
CokedaleCOLORADO572024
Stillwater PassCOLORADO402009
GallinasNEW-MEXICO402024
Bryce CanyonUTAH372024
Pagosa SpgsCOLORADO351982
BoulderUTAH342021
ColonaCOLORADO332014
Dunckley PasCOLORADO332024
Fox CreekCOLORADO292024
La SalUTAH292000
Gold Hill 2COLORADO282024
Ojo SarcoNEW-MEXICO272024
ParlinCOLORADO262023
Gold HillCOLORADO262012
Lizard Head PassCOLORADO262024
CanyonlandsUTAH262006
TsaileARIZONA242023
Lake City 2COLORADO232024
Mcphee Res.COLORADO232024
Cheesman LkCOLORADO222024

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