1.Definition: diving ducks of North America having a bluish-grey bill

Related Noun(s):bluebill, scaup

Category: Animals

2.Definition: freshwater duck of the northern hemisphere having a broad flat bill

Related Noun(s):shoveler, shoveller

Category: Animals

3.Definition: small birds of the Old World tropics having bright plumage and short wide bills

Category: Animals

4.Definition: tropical American heron related to night herons

Related Noun(s):boatbill

Category: Animals