Queen Alexandra’s Sulphur

Colias alexandra

Appearance: Hindwing beneath a uniform pale green with a central white spot uncircled with a colored rim. The underside of the forewing is somewhat more yellow. There is a small black bar just inward from mid-point of the leading edge of the forewing. Upper surfaces yellow with black margins (sometimes reduced or missing).

Size: Medium; 1 1/2 to 2 inches

Habitat: A variety of habitats including grasslands, clearings, wet meadows in woodlands and forest edges

Season: May to early September

Larval Foodplant: Golden banner, milk vetches, clover and other legumes

Did You Know…
Named for Queen Alexandra, wife of Edward VII of England. Her name was also used to describe the world’s largest butterfly, Queen Alexandra’s Birdwing of Papua New Guinea (Pyle, 1981). Caterpillars overwinter in this area.

Species Gallery (click to enlarge)