Based on 6,780 research-grade iNaturalist observations in California, Orange Sulphur is most often recorded in October; in California it behaves like a summer visitor / breeder. It ranks #26 among butterflies recorded in the state in our data.
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Orange Sulphur 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 October
Monarch
Fiery Skipper
Gulf Fritillary
Gray Buckeye
Umber Skipper
Small White
Painted Lady
Western Giant 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 Orange Sulphur appear in California?
Mainly March–October, with the most records in October.
How common is Orange Sulphur in California?
It ranks #26 by number of iNaturalist observations among butterflies in California (6,780 records in our sample).