What bird has the most elaborate, the most complex, the most beautiful song in the world?

哪种鸟有着世界上最优雅、最复杂和最动听的鸣叫声？

youdao

What bird has the most elaborate, the most complex, the most beautiful song in the world?

哪种鸟有着世界上最优雅、最复杂和最动听的鸣叫声？

youdao