Northern Prairie Wildlife Research Center
Blue-green to tan and speckled with pale spots; dorsum with darker green or brown abdominal saddle bordered by netlike pattern of pink and white or brown and yellow. Head with white, brown, or red mottling, which may coalesce to form irregular bands to either side of midline. First 2 thoracic segments with dorsal red-brown triangle. First abdominal segment with paired red tubercles, followed by smaller pair on eighth abdominal segment. Food: oaks and viburnums. Caterpillar: June to October; 2 generations.