Based on 2,384 research-grade iNaturalist observations in Oregon, Tree Swallow is most often recorded in May; in Oregon it behaves like a seasonal. It ranks #55 among birds recorded in the state in our data.
Tachycineta bicolor
Tree Swallow in Oregon by month
Bars show research-grade observations per month. They mix true seasonality with how often people are outdoors, so treat small numbers with caution.
Also seen in Oregon in May
Mallard
American Robin
Canada Goose
Black-headed Grosbeak
Red-winged Blackbird
Bald Eagle
Great Blue Heron
Song Sparrow
Places to look in Oregon
National ForestWillamette National Forest
National ForestMount Hood National Forest
National ForestDeschutes National Forest
Botanical GardenHoyt Arboretum
Botanical GardenLeach Botanical Garden
National ForestUmatilla National Forest
FAQ
When does Tree Swallow appear in Oregon?
Mainly March–June, with the most records in May.
How common is Tree Swallow in Oregon?
It ranks #55 by number of iNaturalist observations among birds in Oregon (2,384 records in our sample).