Grizzly Discovery Center
Located in Grizzly Park at the West entrance of Yellowstone National Park, the Center offers views rarely, if ever, seen in the wild. The web site includes images and introductions to the bears and wolf packs that reside in the Center.
ZooNet Image Archives
An excellent animal photos archival site which recently closed down due to spam. The archives section is still workable and houses hundreds of wonderfully taken photos.
Adam Britton's Crocodilian Species List
Adam Britton holds a Ph.D. in Zoology whose main interest lies in Crocodilian biology. His site features information about the different crocodilian species, topped with wonderfully taken photographs.
Michael T. Bragg's Manatee - Website for Manatee Watchers
This site houses specifically information about manatees, featuring lots of beautifully taken photographs taken by Michael himself and his crew.
John Oswalt's Page
This is John Oswalt's personal web site which contains photos taken by him on his trips to Africa and the Galapagos islands.