Northern Prairie Wildlife Research Center
Handsomely patterned with tans and browns and contrasting lime green second and third thoracic segments. Head with thin black stripes enclosing grayish band. First abdominal segment hornlike. Fifth abdominal segment humped. In closely related unicorn caterpillar, head bears single broader black band to either side and fifth segment not as noticeably humped. Food: many shrubs and trees. Caterpillar: May to October; 1 generation in North.