Northern Prairie Wildlife Research Center
Similar to morning glory prominent, but head bears broader unpaired black band from antenna to vertex and fifth segment not as decidedly humped. Like morning glory prominent, second and third thoracic segments bright green with paired hornlike protuberances on first and eighth abdominal segments. Common name attributable to fleshy horn that arises from dorsum of first abdominal segment. Food: many broadleaf trees and shrubs. Caterpillar: May to October; 1 generation in North.