![Common blue morpho butterfly with magnified scales](https://lizzieharper.co.uk/wp-content/themes/lizzie/images/px.jpg)
Common blue morpho butterfly with magnified scales
Common or Peleides blue morpho butterfly Morpho peleides. Butterfly is on a leaf with magnified detail of the structure of the wing scales. These ridges cause iridescence. Illustration from “30 Animals that made us smarter” by Patrick Ayree (BBC Books).