STEVE ALLEN / SCIENCE PHOTO LIBRARY STEVE ALLEN / SCIENCE PHOTO LIBRARY
Galapagos land iguana (Conolophus subcristatus). This lizard is endemic to the Galapagos Islands, inhabiting the drier areas. Cacti are its main food source and also provide it with the majority of its water intake. In the morning it basks in the Sun to raise its body temperature, but generally prefers shady areas during the hotter parts of the day. It sleeps in a burrow, which helps to conserve its body heat. The land iguana used to exist in vast numbers on the islands, but the arrival of humans led to a severe reduction in its numbers. Photographed on South Plaza Island, Galapagos Islands.
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