Original available from Biological Photo Service. Larger than our other sulfur butterflies. Larger and quite distinct from other locally-occurring yellow butterflies.
Adults are often fast flying and difficult to capture.
Spotty records, principally from the lower elevations of Orange County. The Cloudless Sulfur is multiple brooded, adults flying from February to December. Ornamental Cassia species are utilized in coastal southern California. This sulfur butterfly apparently was once a common sight in the Los Angeles area, until 20 or 30 years ago. It was, until 1976, a very choice capture and very scarce in Orange County.