coal-tit

例句：

1. 1.The coal-tit is a small bird that feeds on insects in the ground.
   煤鸟是一种小鸟类，以地面上的昆虫为食。
2. 2.Coal-tits are known for their colorful plumage and playful behavior.
   煤鸟以其五彩斑斓的羽毛和活泼的行为而闻名。
3. 3.In the spring, coal-tits gather in large flocks to migrate south for the winter.
   春天，煤鸟成群结队地迁徙到南方过冬。