platypus, duckbill, duckbilled platypus, duck-billed platypus, Ornithorhynchus anatinus
['sea slug, nudibranch', 'hyena, hyaena', 'guinea pig, Cavia cobaya', 'hognose snake, puff adder, sand viper', 'king penguin, Aptenodytes patagonica', 'dam, dike, dyke', 'siamang, Hylobates syndactylus, Symphalangus syndactylus']