Scent Of A Female Butterfly

One would imagine that given the beautiful colours of their wings, female butterflies would be fluttering their wings to attract the male. But no. Female butterflies have a store of perfume in their bodies. This store weighs about one-ten thousandth of a milligram. The female uses just a tiny fraction of this and yet, even from a distance of seven miles, the male manages to catch the scent and makes a beeline for her!