african broad-mouthed collagen creases endangered flat-mouthed folds gray grazer grey heavy herbivore herbivorous hide horns keratin large lattice structured mammal megafauna odd-toed ungulate perissodactyl placid powerful rhino rhinoceros skin snout southern white rhinoceros square-lipped rhinoceros strong thick threatened tough white rhinoceros wide-lipped rhinoceros ailuropoda melanoleuca Asian bear bamboo bamboo-eater bear black and white breeding programme captive captivity china chinese conservation distinctive distinguished emblem emblematic giant panda giant panda bear habitat lone mountainous habitat oriental bear panda ponderous popular protected protection sedentary solitary symbol symbolic unique wallpaper zoo animal arboreal Australia fawn furry fuzzy koala Marsupial natural nature phascolarctos cinereus tree trunk wrinkled wrinkles antler-like horns blotched blotches brown browsers camelopard coat coloring colors colouring colours creamy lines eating feeding giraffe knobs legs long-legged long-necked long-tongued mottled ossicones ossified cartilage patches patterned rectangular spots rothschild's giraffe ruminant spread legs strong tongue tallest