Butterflies and Moths of North America

collecting and sharing data about Lepidoptera

Labrador Sulphur
Colias nastes (Boisduval, 1832)

Family: Pieridae
Subfamily: Coliadinae
Identification: Upperside of both sexes dirty white or dirty green-yellow; black border contains white or greenish spots. Underside of hindwing has submarginal rows of black spots.
Wing Span: 1 1/4 - 1 3/4 inches (3.1 - 4.5 cm).
Life History: Overwinter as mature caterpillars.
Flight: One flight from late June-early August.
Caterpillar Hosts: Plants of the pea family (Fabaceae) including milk vetch (Astragalus alpinus) and white clover (Trifolium repens).
Adult Food: Flower nectar.
Habitat: Arctic and alpine tundra.
Range: Alaska south in Rocky Mountains to north-central Washington and northwest Montana.
Conservation: Not usually 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.
Get your BAMONA Gear!

Hoodies and t-shirts in two designs!

Advertise with us!

Do you have a product or service that you think would interest BAMONA users? If you would like to advertise on this website, contact us by email, or use the contact form and select the "Advertising" category.