DESCRIPTION: This butterfly has lemon-yellow wings with a black border, solid black in the male and spotted with yellow in the female. Both forewings have a black spot and both hindwings, an orange spot. Wingspan: 3-5.5 cm. LIFE CYCLE: The eggs are laid singly on the leaves of legumes (Fabaceae family), particularly clovers (Trifolium spp.). The butterfly overwinters as a larva or pupa. There are three generations a year in Québec. ACTIVE PERIOD: The flight season of the adults is from the end of May to October. The caterpillars are active from June to September. ABUNDANCE: Very common, particularly in late summer. HABITAT AND DISTRIBUTION: Fields, clearings with flowers, moist places and roadsides. The Clouded Sulphur is limited to the eastern part of the continent, and is not found south of the Mexican border. SIMILAR SPECIES: The Orange Sulphur (Colias eurytheme), as its name implies, is darker than the Clouded Sulphur, while the Pink-edged Sulphur (Colias interior) has a pink border on all four wings.