any of a number of birds with yellow bills 黄嘴鸭;黄嘴鹃
the African yellow-billed duck (Anas undulata, family Anatidae) the African yellow-billed cuckoo (Ceuthmochares aereus, family Cuculidae) N. Amer.the black scoter (Melanitta nigra, family Anatidae) 非洲黄嘴鸭(拉丁名Anas undulata,鸭科) 非洲的黄嘴鹃(拉丁名Ceuthmochares aereus,杜鹃科) 北美黑海番鸭(拉丁名Melanitta nigra,鸭科)