A large, swift-running flightless bird (Struthio camelus) of Africa, characterized by a long bare neck, small head, and two-toed feet.It is the largest living bird.

• 鸵鸟：非洲一种体形巨大、不会飞但奔跑迅捷的鸟（鸵鸟） ，特征为脖子长而无毛、头小、脚有两趾。