Some of the sword handles of Turk, Caucasia, Afghanistan, and other central Asia countries all have the style of bird head; which is the source?

土耳其刀，高加索刀，阿富汗刀，中亚刀都存在鸟头型刀柄，哪一个是这种刀柄的源头呢？

youdao

The male bird has a differently shaped head.

雄鸟的头形有点特别。

《牛津词典》

The male bird has distinctive white markings on its head.

雄鸟的头上有明显的白色斑纹。

《牛津词典》

He saw a colored head . the head of a beautiful pheasant bird.

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