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Large bee fly. Coloured scanning electron micrograph (SEM) of a large bee fly (Bombylius major). This bee mimic has a hairy body and long hairy legs. Its long proboscis (left) is used to feed on nectar. The larvae of this species are parasites of solitary wasps and bees. Magnification: x10 when printed 10 centimetres wide. (KEYSTONE/SCIENCE PHOTO LIBRARY/STEVE GSCHMEISSNER)