Based on 1,476 research-grade iNaturalist observations in Washington, Pale Swallowtail is most often recorded in June; in Washington it behaves like a seasonal. It ranks #8 among butterflies recorded in the state in our data.
Papilio eurymedon
Pale Swallowtail 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 June
Western Tiger Swallowtail
Lorquin's Admiral
Small White
Clodius Parnassian
Boisduval's Blue
Snowberry Checkerspot
Painted Lady
California Tortoiseshell
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 Pale Swallowtail appear in Washington?
Mainly May–July, with the most records in June.
How common is Pale Swallowtail in Washington?
It ranks #8 by number of iNaturalist observations among butterflies in Washington (1,476 records in our sample).