Bagworm is the common name given to the larvae of certain species of moths.
Size varies depending on the species.
They vary in color from black to beige. The cases or bags are composed of silk and portions of leaves and twigs from the plant on which they feed. Bagworms attack many deciduous and evergreen trees and shrubs. Young larvae feed first on the leaf surfaces and later they eat all but the larger veins. Trees may be almost complet- ely defoliated due to the bagworms feeding.