Is there something about the shape of a butterflys wings that categorize it as a Swallowtail?
Take a look at a photograph of a Swallowtail butterfly – there are two long tails on the hide wings (like the forked tail of a Swallow). Unfortunately though the family groupings of many animals/insects etc don’t always have all of the characteristics that the family is named after – so there may be some species that lack this feature (all of the one named as Swallowtails in Europe have the tails though, but others in related sub-families don’t).
