LOUISE HUGHES / SCIENCE PHOTO LIBRARY LOUISE HUGHES / SCIENCE PHOTO LIBRARY
Wasp simple eyes, coloured scanning electron micrograph (SEM). These three dorsal ocelli ('simple eyes') are located on top of the wasp's head. Each ocellus is much smaller than the paired compound eyes on each side of the head. The ocelli are thought to aid stability during flight as well as monitoring light levels. Magnification: x100 when printed at 10 centimetres across.
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