Butterflies and Moths of North America

collecting and sharing data about Lepidoptera

Scudder's Sulphur
Colias scudderi Reakirt, 1865

Family: Pieridae
Subfamily: Coliadinae
Identification: Upper surface of male lemon yellow; dark wide border cut by yellow veins. Females often white, with small black cell spot; border incomplete or lacking. Underside of both sexes dirty green.
Wing Span: 1 1/2 - 2 inches (3.8 - 5.1 cm).
Life History: Males patrol near willows for receptive females. Females lay eggs singly on young host plant leaves. Caterpillars eat leaves. Second-, third-, and fourth-stage caterpillars hibernate.
Flight: One flight from late June-August.
Caterpillar Hosts: Willow shrubs in the willow family (Salicaceae).
Adult Food: Flower nectar.
Habitat: Mountain meadows and willow bogs.
Range: Alaska south through Rocky Mountains to northern New Mexico.
Conservation: Not usually required.
NCGR: G4 - Apparently secure globally, though it might be quite rare in parts of its range, especially at the periphery.
Management Needs: Not reported.
Comments: NULL
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