The largest bird on earth is the African ostrich, also a flightless bird. In biological classification, it is the only species in the Ostrichidae family. The body length of African ostrich is about 183-300 cm, the height is 240-280 cm, and the weight is 130-150 kg. The female bird is slightly smaller. A slender, snake-like neck supports a small head with a short, flat, triangular mouth composed of several horny sheaths.
The main characteristic of the African ostrich is that the keel is underdeveloped and cannot fly. It is also the only two-toed bird among the existing birds in the world. It has dangerous toenails about 7 cm long on each big toe of its feet, and its hind limbs are thick. Strong and suitable for running.
African ostriches live in the desert grasslands and savanna areas of Africa. Their feathers, skin and meat have high economic value. They have the advantages of fast growth, strong fecundity, easy raising and strong disease resistance. They are used in many countries. The country is widely domesticated.
The African ostrich is the only species in the order Ostrichidae and is also a representative of the walking birds. The ancestor of the ostrich is also a flying bird. How it became what it is today has a very close relationship with its living environment.
The ostrich is a primitive remnant bird that represents an evolutionary direction in which animals in open grasslands and desert environments gradually develop toward tallness and good running. At the same time, the ability to fly gradually weakens until it is lost. The African ostrich's running ability is amazing. Its toes tend to be reduced because they are suitable for running. It is the only bird in the world with only two toes. The outer toes are smaller and the inner toes are particularly developed. It can jump 2.5 meters into the air and sprint at a speed of more than 70 kilometers per hour. At the same time, the thick legs are also the main defense weapon of the African ostrich, and can even kill lions and leopards.
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