Pollen on the head of a wasp. Coloured scanning electron micrograph (SEM) of a wasp's head (order Hymenoptera) with attached pollen (dark blue spots). Its large compound eyes are seen on either side of its head. Above the eyes are its antennae, which are used for sensing smells. Below the antennae are its powerful biting jaws (mandibles). When on the hunt for nectar, wasps can also become accidental pollinators by travelling from plant to plant carrying pollen. While their contribution to pollination may not be as substantial as bees', wasps still play a valuable part. Magnification: x130, when printed 10 cm wide.