The anglewings (genus Polygonia) and tortoiseshells (genus Nymphalis) are closely related and share many characteristics. Both groups feed on sap, rotting fruit, and animal scat or carrion rather than flowers. Both groups overwinter in Ontario as adults, hiding in narrow tree cavities, beneath bark, or in cracks in human dwellings; as a result, these are usually the first butterflies to be seen early in the spring.