Based on 2,140 research-grade iNaturalist observations in Washington, Tree Swallow is most often recorded in May; in Washington it behaves like a seasonal. It ranks #75 among birds recorded in the state in our data.
Tachycineta bicolor
Tree Swallow in Washington 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 Washington in May
Mallard
American Robin
Canada Goose
Great Blue Heron
Dark-eyed Junco
Song Sparrow
Red-winged Blackbird
Bald Eagle
Places to look in Washington
National ForestGifford Pinchot National Forest
National ForestOlympic National Forest
State ParkPeace Arch Park
National ForestColville National Forest
National ForestMount Baker–Snoqualmie National Forest
Botanical GardenBellevue Botanical Garden
FAQ
When does Tree Swallow appear in Washington?
Mainly April–June, with the most records in May.
How common is Tree Swallow in Washington?
It ranks #75 by number of iNaturalist observations among birds in Washington (2,140 records in our sample).