鸵鸟是世界上现存最大的鸟。雄鸵鸟体羽几乎全是黑色的,只有翅膀和尾巴上有一些白色的羽毛。雌鸵鸟身上的羽毛主要是污灰色的。雄鸵鸟要比雌鸵鸟稍大一些。它们有长长的脖子,看上去显得非常高傲。鸵鸟不会飞,但它跑得很快,是世界上跑得最快的鸟。鸵鸟通常生活在开阔的地方,这样 Ostrich is the largest bird in existence in the world. The ostrich feather is almost entirely black, with only white feathers on the wings and tail. Female feathers ostrich feathers are mainly greyish-gray. Male ostrich slightly larger than the female ostrich. They have a long neck and look very proud. Ostrich does not fly, but it runs very fast and is the fastest bird in the world. Ostrich usually lives in open areas, so