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。是世界上存活着的最大的鸟。