PHILIPPE PSAILA / SCIENCE PHOTO LIBRARY PHILIPPE PSAILA / SCIENCE PHOTO LIBRARY
Andean condor(Vultur gryphus) on a cliff top. Andean condors are one of the world's largest birds. They are critically endangered (as of 2010) and are the subject of the Andean Condor Conservation Project, which aims to reintroduce members of the species to the wild. Photographed in Patagonia, Chile.
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