butterfly butterfly chrysalis butterfly pupa chrysalis common crow emmen emmen zoo Euploea core life cycle lifecycle Noorder Dierenpark pupa antenna eye fresh insect Lepidoptera New Papilio rhopalocera swallowtail tail wing black hang red suspend idea white animals bug caterpillar closeup eat green krayker larvae leaf macro metamorphosis moth munch nature pupae worm dry emerge emerging expand invertebrate natural row series tropical