The "Green Dragontail Butterfly” ,is an amazing butterfly .They are from the species of Swallowtail butterfly.It is a small butterfly , because its wingspan is around 40 to 55 millimeters.It is found in Northeastern India , Myanmar , Thailand , Laos , Vietnam , Southern China and many more all around the world .They are in the category of endangered species .Among the smallest of the butterflies in India , they are normally found in sunlit patches near rivers, or streams. Unlike , the other butterfly species , they have the ability to suck up water with dissolved minerals and filter out the excess water .Their eggs are green , spherical , smooth and near transparent , which is all of the things that are related to the eggs of other Swallowtail butterflies .The colour of the caterpillars bodies , are green with black dots .They normally fly in groups of two three and they can fly at an altitude of one-hundred to one-thousand five hundred and twenty meters.