- boatbill, boat-billed heron, broadbill, Cochlearius cochlearius - tropical American heron related to night herons
--1 is a kind of heron
--1 is a member of Cochlearius, genus Cochlearius - scaup, scaup duck, bluebill, broadbill - diving ducks of North America having a bluish-gray bill
--2 is a kind of duck
--2 is a member of Aythya, genus Aythya
--2 has particulars:greater scaup, Aythya marila; lesser scaup, lesser scaup duck, lake duck, Aythya affinis - shoveler, shoveller, broadbill, Anas clypeata - freshwater duck of the northern hemisphere having a broad flat bill
--3 is a kind of duck
--3 is a member of Anas, genus Anas - broadbill - small birds of the Old World tropics having bright plumage and short wide bills
--4 is a kind of passerine, passeriform bird
--4 is a member of Eurylaimidae, family Eurylaimidae