Based on 16,592 research-grade iNaturalist observations in California, Gray Hairstreak is most often recorded in August; in California it behaves like a summer visitor / breeder. It ranks #12 among butterflies recorded in the state in our data.
Strymon melinus
Gray Hairstreak 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 August
Monarch
Fiery Skipper
Gulf Fritillary
Gray Buckeye
Small White
Woodland Skipper
Western Tiger Swallowtail
Acmon Blue
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 Gray Hairstreak appear in California?
Mainly May–October, with the most records in August.
How common is Gray Hairstreak in California?
It ranks #12 by number of iNaturalist observations among butterflies in California (16,592 records in our sample).