Across the globe, species are vanishing at rates 1,000 times greater than ever. Meet five of the world's most endangered species, from tigers to turtles, through their portraits taken for National Geographic Photo Ark by Joel Sartore.
Across the globe, species are vanishing at rates 1,000 times greater than ever. Meet five of the world's most endangered species, from tigers to turtles, through their portraits taken for National Geographic Photo Ark by Joel Sartore.