The purple emperor butterfly, which can be found in forests in southern Britain and central Europe, was one of the first butterfly species to be recognized.
It was identified in the 17th century, when it known as the Emperor of Morocco butterfly
Males' wings have a rich purple-blue sheen that is only visible from certain angles.
Female purple emperor butterflies spend almost all of their lives in tree tops, often in oak trees.
The females are not seen very often. The only time they leave the tree tops is to lay their eggs on tree leaves.
Males can also usually be found in the tree tops, where they are territorial.
However, males will sometimes descend to feed on dung or carrion or to drink from puddles.