BirdAnalyst
Species · BCR 9 · BBS 2025 Release · 1966–2024

Violet-green Swallow In Great Basin

All regionsGreat BasinAerial insectivores

Violet-green Swallow in Great Basin has edged down: down 14% on the route-weighted index since 1970.

-14%Since 1970
189Routes In Region
56Years

Notable Signals

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

Forecast

If the recent trend holds, Violet-green Swallow in Great Basin is projected to stay roughly flat through 2029, near 3.5 (95% range 1.8–5.2). A 5-year backtest shows a typical error of ±14.5%, with 100% of held-out values landing inside the 95% band.

+5%Change by 2029
3.5Projected 2029 index
1.8–5.295% range
±14.5%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
20253.51.75.2
20263.51.85.2
20273.51.85.2
20283.51.85.2
20293.51.85.2

Routes In Great Basin

Routes recording Violet-green Swallow in Great Basin.
TwispWASHINGTON992024
OrdnanceOREGON691978
Meadow VallyNEVADA602024
LeavenworthWASHINGTON372024
HyrumUTAH331979
NewhalemWASHINGTON332024
Hardware RanchUTAH282018
Pine CreekUTAH252013
Magic MtnIDAHO242024
RanchograndeNEVADA221991
YakimaWASHINGTON212024
SelahWASHINGTON202019
ReardanWASHINGTON192024
IngallsCALIFORNIA171973
SnowdenWASHINGTON172024
EllensburgWASHINGTON162024
Mt HoodOREGON132024
Malheur NwrOREGON131991
Dougal ResIDAHO122024
L. WenatcheeWASHINGTON122023
LikelyCALIFORNIA112019
ImnahaOREGON112024
BickletonWASHINGTON112019
Rye PatchNEVADA101974
Catlow RimOREGON102016

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