Scanning electron microscope (SEM) view rotating around the head of a glasswing butterfly (Greta oto). The head bears large compound eyes, made of individual units called ommatidia. Below the eyes are sensory palps, used for tasting food. Emerging from between the eyes are long antennae, used for detecting scents in the air. At the base of the head is the coiled proboscis, which is uncoiled into a sucking tube for feeding. The glasswing butterfly is named as its wings are not covered in colourful scales as is the case with most butterflies, instead having large transparent areas more like the wings of other insects.