PETER CHADWICK / SCIENCE PHOTO LIBRARY PETER CHADWICK / SCIENCE PHOTO LIBRARY
Male barking gecko (Ptenopus garrulus). This nocturnal gecko gets its name from the barking- like sound it makes at sunset. It can grow up to eight centimetres long and feeds mainly on termites. The male has a bright yellow patch on its throat, which it displays to attract females. Photographed in the Kalaharan Desert, South Africa.
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