山鸟类

例句：

1. 1.The mountain bird species is unique to this region.
   这种山鸟物种仅存在于该地区。
2. 2.Mountain birds are known for their ability to survive in harsh environments.
   山地鸟类因其在恶劣环境中生存的能力而闻名。
3. 3.Researchers have been studying the mountain bird population for decades.
   研究人员已经研究了几十年的山地鸟类种群。