Duckbill may refer to: Platypus, Ornithorhynchus anatinus Duckbill dinosaurs, family Hadrosauridae Duckbill fishes, family Percophidae Duckbill eels, family Nettastomatidae Duckbill choke, a shotgun accessory Duckbill valve, a valve used to prevent back flow Duckbill (rock formation), Oregon Duckbill mask See also Bird's beak Duck Animal common name disambiguation pages