African-dwarf-crocodile animal armoured-skin black-crocodile bony-crocodile broad-snouted broad-snouted-crocodile carnivore carnivorous cold-blooded crocodile Crocodilia dense-rainforest distinctive dwarf-crocodile habitat-loss nocturnal open-mouthed osteolaemus-tetraspis reptile reptilian rough-backed-crocodile small solitary-animal vulnerable West-African zoo animals appearance Asian-elephant-subspecies big browsers close color colored colors colour coloured colours communicating connected connecting elephant-hide elephants elephas-maximus-indicus enclosure endangered Females grazers hair hairy heavy herbivore hide Indian-elelphants intelligent mammal megaherbivores skin strength strong style texture textures tough trunks wrinkled wrinkles wrinkly tusks downpour rain raining Singapore wet