Keio University professor Shigeru Watanabe and other researchers confirmed that the birds could distinguish between the two languages in experiments using English and Chinese translations of Japanese novels.

• 庆应义塾大学教授渡边茂和其他研究人员,利用日本小说的中、英语翻译进行实验,证实鸟儿可以区分出这两种语言。