General: Western Whites (Pontia occidentalis) are medium-sized butterflies recognized by their white wings and bodies, black marking on the forewings, and yellow-green markings on the ventral side of both wings, but especially the hindwings. On the dorsal surface of the forewing, the black marks on the edge of the wing (marginal marks) are lighter than the submarginal marks.

Taxonomy: Family: Pieridae (whites and sulphurs); Subfamily: Pierinae (whites).

Where to Find: Western Whites occur from central California to central New Mexico, and northward into Canada, including southern Nevada.

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