bears blurred background brown dangerous hair head headshot jaw playing teeth beak bird close close-up eyes feathers fowl goose nature nostrils white 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