Butterflies and Moths of North America

collecting and sharing data about Lepidoptera

Asella sphinx
Sphinx asellus


Family: Sphingidae
Subfamily: Sphinginae
Identification: Forewing is pale silver-gray with a series of black dashes, a white patch at the tip, and a white stripe along the outer margin. Hindwing is black with blurry white bands.
Wing Span: 3 1/4 - 3 7/8 inches (8 - 9.9 cm).
Life History: Fully-grown caterpillars pupate and overwinter in underground burrows.
Flight: . One brood from May-July.
Caterpillar Hosts: Not reported.
Adult Food: Probably flower nectar.
Habitat: Pinyon-juniper woodland and similar arid situations.
Range: Nevada, Utah, Colorado, Arizona, and New Mexico.
Conservation: Study of population status and ecological requirements is recommended.
NCGR: G3 - Very rare or local throughout its range or found locally in a restricted range (21 to 100 occurrences). (Threatened throughout its range).
Management Needs: None reported.
Comments: NULL