Phyllodesma americana

The caterpillar is grayish with minute orange speckles, and densely covered with soft fur. When it stretches, the divisions between the thoracic segments are seen to be orange on the back. At rest, the caterpillar flattens itself closely against a twig. I have reared it on willow and oak, though many other trees and shrubs have been recorded. It pupates in a silken cocoon in which it stays for the winter. The adult rests in a characteristic posture, with the forewings arranged like a roof and the hindwings laid out horizontally.