Butorides is a genus of small herons. It contains four similar species, the striated heron Butorides striata, the lava heron Butorides sundevalli, the green heron Butorides virescens and the little heron Butorides atricapilla. They are closely related, and some authorities have considered them all to be subspecies of just one species; when treated so, the merged species is called green-backed heron. The name Butorides derives from Middle English Butor ("bittern") and the Ancient Greek suffix -oides, "resembling".