Mylitta Crescent

Identification: Upperside is bright reddish orange with narrow dark markings. Lacks the prominent black inner marginal spot of Phyciodes pallidus. Underside is yellow-orange with somewhat blurry rusty orange markings.

Caterpillar hosts: Native thistles (Cirsium), milk thistle (Silybum marianum), and European thistles (Carduus).

Adult food: Flower nectar.

Habitat: From sea level to 8000 feet in mountains, fields, meadows, roads, vacant lots, parks, and fencerows.

Range: Southern British Columbia southeast through the Rocky Mountain region to Mexico; south to Washington, Oregon, and California.

Males perch or patrol all day near host plants for females. Eggs are deposited on underside of host plant leaves; caterp... read moreillars eat leaves. Young caterpillars may live in a small silken nest; partially-grown caterpillars hibernate.

Wing span: 1 1/8 - 1 1/2 inches (3 - 3.8 cm).