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Bill Bouton   cc-by-sa-3.0

Colias occidentalis (Western Sulphur) is a species of butterflies in the family Pieridae. They visit flowers of bluedicks, Taraxacum tenejapense, and ookow.

EOL has data for 9 attributes, including:

Known occurrences, collected specimens and observations of Western Sulphur. View this species on GBIF