Butterfly head. Coloured scanning electron micrograph (SEM) of the head of a small tortoiseshell butterfly (Aglais urticae). Its compound eye is seen at upper right, and its coiled proboscis is seen below it at lower centre. This proboscis is unrolled to feed on nectar and other liquid food. Small tortoiseshell butterflies are found throughout Europe. Magnification: x10 at 5x7cm size. Magnification: x26 at 5x7ins size.