Tame birds, when approached, will stretch out their necks and ruffle their neck feathering.

驯化的鸟在人靠近时会伸长脖子，竖起脖子上的羽毛。

《柯林斯英汉双解大词典》

Tame birds, when approached, will stretch out their necks and ruffle their neck feathering.

驯化的鸟在人靠近时会伸长脖子，竖起脖子上的羽毛。

《柯林斯英汉双解大词典》