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Scudder's Willow sulphur butterfly

Colias scudderii


The underside of both sexes of the widow sulpher is dirty green.The wingspan is 38–51 mm (1.5–2.0 in). The upper surface of the males is lemon yellow with a dark wide border cut by yellow veins. The border is incomplete or lacking. Adults are on wing from June to August. They feed on flower nectar.


The Willow Sulphur is a butterfly in the Pieridae family. It is found from Alaska south through the Rocky Mountains to northern New Mexico. The habitat consists of mountain meadows and willow bogs.

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Spotted by

Des Moines, Iowa, USA

Spotted on Aug 20, 2015
Submitted on Aug 20, 2015

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