any member of a group of butterflies in the gossamer-winged butterfly family, Lycaenidae (order Lepidoptera). The copper's typical coloration ranges from orange-red to brown, usually with a copper tinge and dark markings. The most common North American copper is species Lycaena phleas. Copper larvae feed on clover, dock, or sorrel.

Adults are delicate, with an 18- to 38-mm (.75- to 1.5-inch) wingspan. They are rapid fliers and are usually distinguished by iridescent wings. The male's forelegs are reduced, but the female's are fully developed.