Photo Doc Animals in Peril: In Lakes, Rivers and Wetlands Four Photos (in two sets). Prehistoric survivors face extinction Caption: The Chinese alligator, also known as the earth dragon, and the Gharial, found in India and Nepal, are the most threatened crocodile species. Fewer than 200 individuals of each species remain in the wild. Hunting and vanishing habitat have pushed these prehistoric animals to the brink. Zoologists have tried to increase their numbers by breeding them in captivity, but habitat protection offers the only viable strategy to improve their chances of survival. Baby Chinese alligator: Wildlife Conservation Society permission required http://wcs.org/home/wild/herpetology/crocs/ Gharial: Gettyimages (gettyimages.com) Permission and use rights required Photo title: A Threatened African Icon Caption: Both the common hippopotamus, seen here on the Zambezi River in Africa, and its more reclusive cousin, the pygmy hippo, found in the swamps of West Africa, are now threatened with extinction because of habitat loss and hunting for meat and ivory. Photo sources: Hippo: photo from Jon Hoekstra (TNC) – high res available at no cost. Pygmy hippo: from ARKive.org permission required.