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Attributes of Colias philodice
Colias philodice Godart, 1819
Identification: Upper surface of male wings bright, clear yellow with solid black edging; lower side of forewing with some dark submarginal spots; hindwing with silver cell spot rimmed with orange-pink, usually doubled. Female has 2 forms: yellow form with uneven black edging enclosing yellow spots, and a white form which is greenish-white rather than yellow. Spring and fall forms are smaller and less conspicuously marked.
Wing Span: 1 1/2 - 2 3/4 inches (3.8 - 7 cm).
Life History: Eggs laid singly on host; caterpillars eat leaves. Hibernation is by third-stage caterpillars.
Flight: Three flights in the north from May-October, 4-5 in the south from March-November.
Caterpillar Hosts: Plants in the pea family (Fabaceae) including alfalfa (Medicago sativa), white clover (Trifolium repens), and pea (Pisum sativum).
Adult Food: Flower nectar of many plants.
Habitat: Many different open areas including fields, lawns, alfalfa and clover fields, road edges, meadows.
Range: Alaska south through central and southeast Canada, all of conterminous United states except much of California, south Texas, and most of Florida.
Conservation: Not required.
NCGR: G5 - Demonstrably secure globally, though it may be quite rare in parts of its range, especially at the periphery.
Management Needs: Not reported.