営えい巣そう

noun, noun or participle which takes 'suru', intransitive verb

nest building; nesting

Used for birds, insects, and other animals constructing a nest. Often appears in news reports and nature writing.

• ツバメが軒のき下したに営えい巣そうした。

  Swallows built a nest under the eaves.

• この森もりでは多おおくの野や鳥ちょうが営えい巣そうしている。

  Many wild birds are nesting in this forest.