The
wingspan is 60–85 mm. Adult moths are
nocturnal; after a brief bout of activity after dusk, they seem to prefer the later hours of the night. The eggs are greenish yellow and small. Hornworms hatch after about 8 days. Primary food sources for the larvae are deciduous trees such as willows, birch and cherries, as well as shrubberies, like
ninebark and roses. Like the rest of the family Sphingidae, they burrow shallowly into soil to pupate. Once they leave their pupa, the adults almost immediately mate. Adults do not feed. ==Gallery==