Northern Prairie Wildlife Research Center
Wingspan 8.8 cm. Forewing is black with a central cream-yellow stripe that extends from base to apex and white wing veins; hindwing is rose-pink with black basal and marginal bands; thorax brown with white streaks. This sphingid is known as the white-lined sphinx and is abundant and widely distributed in western North America. Moths fly during the day and at night in late spring to late summer. Caterpillars are typically found feeding on foliage of Onagraceae and in western forests are common on fireweed (Epilobium).
Similar species: Hyles gallii forewing without white wing veins and white streaks on the thorax, restricted to high elevation habitats, caterpillars feed on fireweed.