duckbilled Definition

any of various herbivorous dinosaurs (family Hadrosauridae) of the Late Cretaceous having the jaw elongated into a snout that resembles a beak : hadrosaur

platypus

a small carnivorous aquatic monotreme mammal (Ornithorhynchus anatinus) of eastern Australia and Tasmania that has a fleshy bill resembling that of a duck, dense fur, webbed feet, and a broad flattened tail —called also duck-billed platypus