Food compositions of birds in winter are complicated, and many species of birds feed colonially.

冬季鸟类食物组成多样，多种鸟类集群活动、觅食。

youdao

Food compositions of birds in winter are complicated, and many species of birds feed colonially.

冬季鸟类食物组成多样，多种鸟类集群活动、觅食。

youdao