STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY
Heads of the male and female mosquito. Scanning electron micrograph (SEM) from the mosquito culex pipiens. Culex pipiens is the most common mosquito in Britain. Only females (bottom) bite humans, males feed off nectar. The antennae of the male are more feathery than the female's and they lack the piercing mouthparts (blue bottom right) of the female. Bites often occur at dawn and dusk. The females of this mosquito are vectors of diseases including West Nile virus and Japanese encephalitis. Magnification: x30, when printed 10 cm wide.
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