metamorphosis of the swallowtail, cockchafer and frog

amphibian animal antenna beetle biology biologycal bug butterfly caterpillar caviar chafer change chrysalis cockchafer cocoon cycle development egg emerging entomology evolution frog growth imago insect instar invertebrate larva life metamorphosis nature ontogenesis ontogeny pest polliwog pupa pupation renewal reproduce sketch stages swallowtail tadpole toad transformation vector vertebrate wing