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Species · Oregon · BBS 2025 Release · 1966–2024

Violet-green Swallow Population Trend in Oregon

All statesAerial insectivores

Violet-green Swallow in Oregon has declined: down 27% on the route-weighted index since 1970.

-27%Since 1970
112Routes In State
56Years

Notable Violet-green Swallow Trends in Oregon

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

Violet-green Swallow Population Forecast in Oregon

If the recent trend holds, Violet-green Swallow in Oregon is projected to rise about 39% by 2029 — from 3.7 in 2024 to a central estimate of 5.1 (95% range 2.9–7.3). A 5-year backtest shows a typical error of ±17.9%, with 100% of held-out values landing inside the 95% band.

+39%Change by 2029
5.1Projected 2029 index
2.9–7.395% range
±17.9%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
20255.12.97.4
20265.12.97.4
20275.12.97.4
20285.12.97.3
20295.12.97.3

Violet-green Swallow Survey Routes in Oregon

Routes recording Violet-green Swallow in Oregon.
Sandy River9220061993
Ordnance6919781978
Glasgow4820241986
Winberry4120231968
Garfield3520231973
Hauser2919851970
Coquille2620241994
Clover Creek2520221976
Scio2220241971
Elkton2220241972
Hazel Camp2020221975
Secret Val2020221975
Santiam2020241994
Derby1919931968
Salado1820241968
Svensen1819921990
Scappoose1620231995
Tualatin1520241968
Wedderburn1420241970
Dayton1420241973
Mt Hood1320241972
Malheur Nwr1319911991
Canby1320241993
Imnaha1120241968
Unity1020231998

Violet-green Swallow Population Trend in Other States

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