用英语介绍鸵鸟

鸵鸟是世界上最大的一种鸟类，成鸟身高可达2.5米，雄鸵鸟体重可达150千克。像蛇一样细长的脖颈上支撑着一个很小的头部，上面有一张短而扁平的、由数片角质鞘所组成的三角形的嘴。鸵鸟不能飞行，是世界上现存鸟类中唯一的二趾鸟类，在它双脚的每个大脚趾上都长有长约7厘米的危险趾甲，后肢粗壮有力，适于奔走。Ostrich is the largest bird in the world , adult birds up to 2.5 meters tall, male ostrich weight up to 150 kilograms . The slender snake-like neck supports a small head with a short, flat, triangular mouth made up of several horny sheaths. The ostrich can't fly. It is the only two-toed existing bird in the world. It has a dangerous toenailwhich is 7 cm long on each big toe of its feet. The hind limbs are very strong and powerful, suitable for running.