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Green drake mayfly (Ephemera danica) nymph. Coloured scanning electron micrograph (SEM) of the head of a green drake mayfly larva, showing its eyes (black, centre left and right), long antennae (top) and mouthparts (upper centre). The larvae of mayflies are aquatic and breath underwater using gills. Magnification: x21, when printed 10 cm wide.
Model release not required. Property release not required.