Wildfowl are wild birds that live on or near water — ducks, geese, and swans above all. The word is a group word, like "cattle": it does not usually take an s, and it takes a plural verb. "Wildfowl are common on the lake", not "a wildfowl" and not "wildfowls". If you need to talk about one bird, name it: a duck, a goose. The word carries a particular flavour: it comes from hunting, and much of the time it still points that way. "Wildfowl" often means these birds seen as game — birds people shoot and eat. That is why you meet it in phrases like wildfowling (hunting them) and wildfowler (a person who does). But it is also the ordinary term in nature writing and conservation: a wildfowl reserve is a protected place where such birds live, and nobody shoots there. It is a somewhat old-fashioned and rather British word. In American English, "waterfowl" is far more common for the same birds. Notice that "wildfowl" says wild, so a duck on a farm is not wildfowl; "waterfowl" says water, so it covers the wild ones and, loosely, tame ones too.

野禽、水鳥（尤指野鴨、雁等可獵食的水邊鳥類）