1. 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：非洲一种体形宏大、不会飞但奔驰迅捷的鸟（鸵鸟），特点为脖子长而无毛、头小、脚有两趾。是世界上存活着的最大的鸟