As a defense against predators, they release a foul-tasting, yellow fluid when they are disturbed. Like most moths, they are nocturnal and are attracted to lights at night. Their typical habitats are usually woodland edges, fields or meadows.
The caterpillar of the Giant Leopard Moth is black and covered in spiky hairs. This hairy type of caterpillar is called a 'woollybear'. It has red rings around it that are most visible when it coils up. It eats the leaves off shrubs, trees and other woody-stemmed plants.