Whistling duck

The whistling ducks or tree ducks are a subfamily, Dendrocygninae of the duck, goose and swan family of birds, Anatidae. They are not true ducks. In other taxonomic schemes, they are either considered a separate family Dendrocygnidae, or a tribe Dendrocygnini in the goose subfamily Anserinae. The subfamily has one genus, Dendrocygna, which contains eight living species, and one undescribed extinct species from Aitutaki of the Cook Islands.

单词	Whistling ducks
释义	Whistling ducks 英语百科 Whistling duck The whistling ducks or tree ducks are a subfamily, Dendrocygninae of the duck, goose and swan family of birds, Anatidae. They are not true ducks. In other taxonomic schemes, they are either considered a separate family Dendrocygnidae, or a tribe Dendrocygnini in the goose subfamily Anserinae. The subfamily has one genus, Dendrocygna, which contains eight living species, and one undescribed extinct species from Aitutaki of the Cook Islands.
随便看	constant pitch screw Constant pool constant portion constant position input constant position ratio constant positive airway pressure constant potential constant potential accelerator constant potential amperometric titration Constant Potential Charge constant potential coulometry constant potential electrolysis constant potential generator constant potential gradient constant potential kilovolt constant potential kilovoltage constant potential modulation constant potential rectifier constant potential regulation constant potentials constant potential supply constant potential surface constant potential system constant potential three phase generator constant potential transformer

Whistling ducks

Whistling duck