close-up endangered eye face grass graze head horn kill mammal medicine mouth musketeers poach rhino rhinoceros aquatic beak bird black feet flightless flipper foot humboldt penguin penguin species Spheniscus humboldti walk white wing swim Africa african animal Asian beast ear Ears elephant elephants India Indian Ivory mount nature pachyderm tusk tusks preen water penguins tag Adaptation Australian Bird of prey brown kookaburra laughing native natural environment organism skin vertebrate wildlife black-rhinoceros collagen creases critically-endangered Diceros bicornis eating folds food gray grazer grey heavy herbivore herbivorous herbivorous-browser hide hook-lipped-rhinoceros horns keratin large lattice-structured megafauna odd-toed-ungulate offspring perissodactyl placid powerful snout southern-white-rhinoceros square-lipped rhinoceros strong surface texture textures thick threatened tough wrinkled wrinkles zoo ape child chimpanzee creature cute danger forest grimace hair mammal monkey primate tropical young zoological baby gorilla hairy hold life looking love mother mum nurture protect together wild