Duckbill may refer to:
Platypus, Ornithorhynchus anatinus Duckbill catfish, Sorubim lima 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