鸵鸟生活在非洲,是世界上最大的鸟,它们不能飞,但奔跑速度非常快。那么,它们那巨大的翅膀会有什么妙用呢?鸵鸟有的时候上下扇动翅膀来给自己降温,还有的时候它们会拍打翅膀来炫耀自己。雄鸵鸟和雌鸵鸟很容易区分,雄鸵鸟为黑色并长有一些漂亮的白色羽毛,而紫鸵鸟为灰色和棕色。如下图这只雌鸵鸟就是一只雄鸵鸟的“主要伴侣”。雄鸵鸟还会与其它雌鸵鸟交配。 Ostriches live in Africa and are the largest birds in the world. They can’t fly but they run very fast. So what’s the magical effect of their huge wings? The ostrich sometimes flutters up and down to cool itself, and sometimes they flap their wings to show off. The male and female ostriches are easily distinguished. The male ostrich is black and has some beautiful white feathers, while the purple ostrich is gray and brown. The female ostrich below is the “primary companion” of a male ostrich. Male ostriches also mate with other female ostriches.