Butterflies have a thorax, head, and 6 legs, thinner antennae than moths, and use their proboscis to drink nectar and liquids. There are approximately 28,000 butterfly species, 80% of which are found in tropical areas, with the largest being the Queen Alexandra's Birdwing. Butterflies go through a life cycle of egg, larva, pupa and adult stages and have been around since the Cretaceous period approximately 65 million years ago.