african broad-mouthed collagen endangered flat-mouthed 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 wide-lipped rhinoceros Australian big big bird bird cultural culture curious curly double-feathers dromaius novaehollandiae Emu fast fauna flightless icon iconic long-legged long-legged flightless bird male native nomadic omnivore omnivorous plumage ratite runner sharp-eyed soft-feathered symbol symbolic three-toed widespread wildlife antler-like horns baringo giraffe blotched blotches browsers camelopard coat creamy lines even-toed ungulate giraffe irregular knobs long-necked long-tongued mottled ossicones ossified cartilage patches patterned rectangular spots rothschild's giraffe ruminant spotted strong tongue tallest ugandan giraffe creases folds white rhinoceros wrinkled wrinkles