Northern Prairie Wildlife Research Center
Outstandingly distinct both in form and behavior. Shiny black with streaky white abdominal saddle, thus resembling fresh bird dropping. Thoracic setae long, directed forward about head. Dorsum of eighth abdominal segment grossly enlarged. Shed head capsules may accumulate over body. Rapidly rocking from side to side when disturbed. Food: broadleaf trees and shrubs. Caterpillar: June to October; 2 generations in North.