Underside is brownish orange with creamy white bands. Female may be similar to male or black with white spots. Eggs are laid in groups on the underside of host plant leaves, which the caterpillars eat.
Caterpillars feed together when young, sometimes in a slight silk web.
Partially-grown caterpillars hibernate. G4 - Apparently secure globally, though it might be quite rare in parts of its range, especially at the periphery. Scott, J. A. 1986. The butterflies of North America. Tilden, J. W. 1986.