This document discusses several extinct and endangered animal species. It provides details on extinct animals like the Dodo bird, which went extinct in 1662 in Mauritius island, and the Tasmanian tiger/Tylacine, which went extinct in 1880 in Australia due to hunting. Several dinosaurs that are now extinct are also described, like the Tyrannosaurus Rex, Ankylosaurus, and Spinosaurus. The document then discusses several animals that are endangered or nearing extinction, such as manatees, Philippine eagles, cheetahs, koalas, and polar bears. Habitat loss and hunting are cited as primary threats. The author urges protecting these animals to prevent further extinctions.