Family: Pieridae, Whites and Sulphurs view all from this family

Description The Queen Alexandra's Sulphur, Alexandra Sulphur, or Ultraviolet Sulfur (Colias alexandra) is a butterfly in the family Pieridae found in North America. Its range includes Alaska to the Northwest Territories and south to Arizona and New Mexico.

Flight period is from mid May until August.

Wingspan is from 38 to 57 mm.

Larvae feed on Thermopsis, Astragalus, Lathyrus, Oxytropis, and Lupinus spp.

Dimensions 1 1/2-1 7/8" (38-48 mm).

Habitat Meadows & fields, Scrub, shrub & brushlands, Grasslands & prairies, Deserts.

Range California, Plains, Rocky Mountains, Western Canada, Southwest, Northwest.