Butterfly flight seasons in Oregon from 63,292 research-grade iNaturalist observations. July has the most activity.
By month
Oregon butterfly calendar (top 40)
Fewer More observations (relative to each row's peak month)
Activity by month (all species)
Most-photographed butterflies in Oregon
California Tortoiseshell
Lorquin's Admiral
Western Tiger Swallowtail
Woodland Skipper
Painted Lady
Small White
Gray Hairstreak
Mylitta Crescent
Echo Azure
Snowberry Checkerspot
Pale Swallowtail
Clodius Parnassian
Anise Swallowtail
Common Ringlet
Silvery Blue
Boisduval's Blue
