african broad-mouthed close close-up cow creases endangered eye eye-lashes eye-lid flat-mouthed folds gray grazer grey heavy herbivore herbivorous hide large lattice-structured mammal megafauna mother odd-toed-ungulate perissodactyl placid powerful rhino rhinoceros skin southern-white-rhinoceros square-lipped rhinoceros strong thick threatened tough white rhinoceros wide-lipped rhinoceros wrinkled wrinkles collagen eating feeding food horns keratin Mud mud-covered muddy offspring snout white-rhinoceros alert biological-interaction bird black curious inquisitive Myna myna-birds mynah Noisy plumage precocious square-lipped-rhinoceros symbiosis symbiotic watchful wide-lipped-rhinoceros black-rhinoceros critically-endangered Diceros bicornis herbivorous-browser hook-lipped-rhinoceros surface texture textures zoo angled angles Australia climb climbing constructed construction curve curved curves danger dangerous deoxyribonucleic-acid DNA-double-helix-molecule DNA-Tower double double-helix handrails height helices helix helixes high Kings-Park lookout lookout-tower park Perth platform public- park skywards spiral spiral-staircases spiraling spiralling staircases steel strength structure top tower towering turning view viewing-decks Western-Australia appearance barrier coloring colors colouring colours dry-stone-hedge dry-stone-wall drystane-dyke fitted free-standing light local-stone old patchwork perspectives random randomly-coursed rock-fence rocks rough rugged rural secure security shaped shapes sharp solid stone stone-fence stone-walled stones stonework sunlight sunshine surfaces uneven variations variety wall walled