Colias behrii

The Behr's Sulphur or Sierra Green Sulfur (Colias behrii) is a butterfly in the Pieridae family. It is endemic to California's Sierra Nevada from Tuolumne County south to Tulare County.[2]

The wingspan is 35–42 mm (1.4–1.7 in). The upper surface of the males is dull green with a dark border and with a pale hindwing cell spot. Females are greenish-yellow with a dark diffuse border. The underside of both sexes is green. Adults are on wing from July to August. They feed on flower nectar.[2]

The larvae feed on Vaccinium species and Gentiana newberryi.[2]


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