Canada Sulphur (Colias canadensis Ferris)
Wing span: 1 1/2 - 1 3/4 inches (3.9 - 4.6 cm).
Identification: Fringes pinkish. Male yellow-orange with narrow black borders and a very small discal dot. Female usually white, but may be orange or yellow with black borders. Underside of hindwing yellow or white with a pink-edged discal spot smeared outwardly. A smaller accessory spot lies above the discal dot.
Life history: Unknown.
Flight: One flight from early May to August, appearing earlier at lower elevations.
Caterpillar hosts: Unknown.
Habitat: Mixed forest in mountain valleys and alpine tundra.
Range: Alaska and northern British Columbia to western N.W. Territories, and south to central Alberta.
