appearance beak beard big birds caruncles color colored colorful colors colour coloured colourful colours dewlap display displaying distinctive domestic-turkey domesticated-turkey feathers fleshy-protuberance Galliformes gobble gobbler gobbling large male meleagris meleagris-gallopavo plumage poultry protuberance snood stag tail-feathers tom Turkey variations varieties variety wattle white broad-breasted-bronze-tom animal aquarium aquatic bulbous bulbous-growth carnivore carnivorous critically-endangered crocodile crocodilian elongated-snout fish-eating-crocodile freshwater gavial gavialis-gangeticus ghara Gharial hollow-bulbous-nasal-protuberance Indian-gavial Indian-gharial interdigitated-teeth jaws long-narrow-snout long-nosed-crocodile nostril-swelling piscivorous reptile reptilian Singapore teeth vocal-resonator water zoo