Purple Emperor - Apatura iris - male (top row) - female (bottom row). Wingspan 65mm. An impressive and iconic butterfly of broadleaved woodlands with tall oaks and mature Goat Willows (the larval foodplant). Adult has brown upperwings marked with a white band; the male has the purple sheen, only seen at certain angles. Underwings of both sexes are chestnut with a white band. Flies July-August. Larva is green with diagnostic &lsquo;horns&rsquo; at head end. Rare and local, restricted to a few good woodlands in southern England.