鸟类的

例句：

1. 1.Birds are an important part of our ecosystem.
   鸟类是我们生态系统的重要组成部分。
2. 2. The bird's call is a warning signal for other birds.
   鸟的叫声是其他鸟的警告信号。
3. 3. Avian diseases can spread quickly among populations.
   禽类疾病可以在种群之间迅速传播。