Genus
Colias (Clouded yellows)
Colias eurytheme. Photo: (c) Ale Türkmen, some rights reserved (CC BY-NC-SA)
Colias is a genus of butterflies in the family Pieridae. They are usually called clouded yellows; the North American name “sulphurs” is elsewhere used for Coliadinae in general. The closest living relative is the genus Zerene, which is sometimes included in Colias.
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