词条 | freckled duck |
释义 | freckled duck bird (Stictonetta naevosa), rare Australian waterfowl, characterized by dark dots scattered over its metallic-gray plumage; in breeding season the drake's bill turns red. The freckled duck is a surface feeder. It lacks alarm calls, courtship display, and demonstrative pair bonds. It may constitute a separate tribe, Stictonettini, family Anatidae (q.v.; order Anseriformes). The duck has been classified as endangered by the Australian government, which has taken measures to protect it. |
随便看 |
|
百科全书收录100133条中英文百科知识,基本涵盖了大多数领域的百科知识,是一部内容开放、自由的电子版百科全书。