Species Page: Orange Sulphur (Colias eurytheme)

Orange Sulphur / Alfalfa Butterfly

Colias eurytheme (Boisduval, 1852)

Family: Pieridae

Status: Abundant resident

NENHP Ranking: Not listed

Range: Inhabits North America south of southern Canada. In Nebraska it can be found statewide. It is one of a few butterfly species in Nebraska reported from all 93 counties.

Larval Hostplant(s): Many herbaceous legumes, but especially alfalfa (Medicago sativa).

Broods/Flight Times: Multiple broods from spring thaw to killing frost.

Overwintering: As a pupae.

Habitat: Equally at home in urban and rural setting but especially abundant near cultivated alfalfa.

Avg. Wingspan: 1 3/8 – 2 3/4 inches

Found at:

Similar Species: Clouded Sulphur

Notes: Nebraska’s most common butterfly. Males fluoresce under ultraviolet light. Albinic individuals (always females) are common.

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