occidentalis

Western White

Pontia occidentalis (Reakirt, 1866)

Family: Pieridae

Status: Uncommon resident

NENHP Ranking: S2, Tier 2

Range: This species is a resident from much of Alaska east through Ontario, and south through Colorado, Utah, Nevada and northern California. In Nebraska it has been found in the panhandle and Dundy County.

Broods/Flight Times: Up to three broods from mid-May through August

Larval Hostplant(s): Various members of the Crucifer family are listed, of which the following occur in Nebreaska: Mustards (Arabis drummondiA. glabraBrassica nigraChorispora tennillaSisymbrium altissimum), Flixweed (Descurainia sophia), and varities of Peppergrasses (Lepidium virginicum and Ldensiflorum).

Habitat: The Western White is most often encountered on rocky or short grass prairie hillsides, although it has also been found in “urban” areas.

Found at: Buffalo Creek SWMA, Sidney I-80 East rest stop

Overwintering: As pupae

Similar Species: Checkered and California Whites

Notes:

Western White, Terry Spivey, USDA Forest Service, Bugwood.org
Western White – female, dorsal
Western White – female, ventral
Western White – male, dorsal
Western White – male, ventral

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