Based on 2,424 research-grade iNaturalist observations in California, Boisduval's Blue is most often recorded in June; in California it behaves like a summer visitor / breeder. It ranks #45 among butterflies recorded in the state in our data.
Icaricia icarioides
Boisduval's Blue in California 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 California in June
Monarch
Gray Buckeye
Western Tiger Swallowtail
Variable Checkerspot
Small White
Anise Swallowtail
California Sister
Pale Swallowtail
Places to look in California
Botanical GardenThe Huntington Library, Art Museum, and Botanical Gardens
State ParkHearst Castle
Botanical GardenSan Francisco Botanical Garden
State ParkAnza-Borrego Desert State Park
National ForestAngeles National Forest
National ForestSequoia National Forest
FAQ
When does Boisduval's Blue appear in California?
Mainly April–July, with the most records in June.
How common is Boisduval's Blue in California?
It ranks #45 by number of iNaturalist observations among butterflies in California (2,424 records in our sample).