Butterflies and Moths of North America

collecting and sharing data about Lepidoptera

Northern Marble
Euchloe creusa (Doubleday, [1847])

Family: Pieridae
Subfamily: Pierinae
Identification: Pale markings at tip of upperside of front wing; cell bar narrow. Fore- and hindwing bases dark on the uppersides. Underside of hindwing with considerable "fractured" dark marbling.
Wing Span: 1 3/8 - 1 5/8 inches (3.5 - 4.2 cm).
Life History: Females lay single eggs on host plant flower buds; caterpillars eat flowers and fruits. Chrysalids hibernate.
Flight: One flight from May-July.
Caterpillar Hosts: Plants of the mustard (Brassicaceae) family.
Adult Food: Flower nectar. Specific plants not reported.
Habitat: Mountains, rocky outcrops, trails, roadsides.
Range: Alaska south and east to British Columbia, Alberta, and Saskatchewan. Northern Montana in Glacier National Park.
Conservation: Widespread in Alaska, but very restricted in lower 48 states.
NCGR: G5 - Demonstrably secure globally, though it may be quite rare in parts of its range, especially at the periphery.
Management Needs: Study habitat requirements and manage accordingly.
Comments: NULL