6. A large, clumsy, flightless bird(Raphus cucullatus), formerly of the island of Mauritius in the Indian Ocean, that has been extinct since the late17th century.

• 渡渡鸟，孤鸽以前生于印度洋的毛里求斯岛上的一种大而笨重不会飞的鸟（渡渡鸟），17世纪即已绝种收藏指正