african broad-mouthed calf collagen cow creases endangered flat-mouthed folds gray grazer grey heavy herbivore herbivorous hide horns junior keratin large lattice-structured mammal megafauna mother odd-toed-ungulate offspring perissodactyl placid powerful rhino rhinoceros skin snout southern-white-rhinoceros square-lipped rhinoceros strong thick threatened tough white rhinoceros wide-lipped rhinoceros wrinkled wrinkles youngster animals Asian-elephant-subspecies big browsers close color colored colors colour coloured colours communicating connected connecting downpour elephant-hide elephants elephas-maximus-indicus enclosure Females grazers habitat-loss hair hairy Indian-elelphants intelligent megaherbivores rain raining Singapore strength style texture textures trunks tusks wet wrinkly zoo armor armored armorment armour armoured armourment Australian-freshwater-crocodile backstraps basking bony ridges crocodile crocodilian crocodylus-johnsoni crocodylus-johnstoni danger dangerous dorsal-surface exotic fauna freshie hornback Johnston's-crocodile leather leathery lethargic omnivorous opportunistic opportunistic-predator osteoderms patterns predator reflection reptile reptilian ridges rough rugged scales scutes tail territorial textured close-up eye eye-lashes eye-lid