[1] It feeds on plants of three genera: Ceanothus, Rhamnus (including coffeeberry), and Rosa.

[1][2] Nuttall's sheep moth and one other species are similar, occurring in sagebrush areas east of the Sierra Nevada.

[3] The sheep moth has a 5.5-8.5 centimeter wingspan and a relatively slender body.

Its forewings are pink with a yellow streak in the middle and the hindwings are yellowish with variable black markings.

[1] The larvae are black with branched yellowish spines that become orange in later development and an orange-brown head.