avian

例句：

1. 1. Many birds are known to migrate between different parts of the world.
   许多鸟类被知道在世界上的不同部分之间迁徙。
2. 2. The bird's nest is made from sticks and leaves.
   鸟巢是用树枝和叶子做成的。
3. 3. Birds can be found in many different habitats around the world.
   世界各地都能找到各种不同栖息地的鸟类。