Ostrich is the largest bird in the world, which belongs to the dinosaur era and has high reproductive value. It is characterized by fast reproductive production, low reproductive cost and high economic value. Ostrich is a livestock breed imported from abroad, and its breeding and feeding technology is independently developed by domestic scientific and technological personnel on the basis of learning from foreign experience, and is constantly summarized and improved in production practice, developing towards scientific and standardized feeding. Now we have basically mastered the ostrich breeding management technology.

The ostrich lays eggs, weighing about 1.5 kg. Young ostriches can hatch after 3 ~ 44 days in artificially controlled environment. Before the young ostrich is three months old, it is necessary to create a good living environment and let the young ostrich spend the three-month brooding period safely and healthily. Ostriches over three months have developed well in various functions and entered the normal feeding and management period.

Ostrich orders include African ostriches, American ostriches, Australian ostriches and cranes. African ostriches are basically cultivated at home and abroad because of their fast growth, strong reproductive ability, easy feeding and strong disease resistance. It belongs to Ostrich, Ostrich and African ostrich species. Species is the basic unit in animal taxonomy, and species is the concept of animal husbandry, mainly the product of artificial selection.

Domestication history of domestic animals such as pigs, horses, cattle and sheep can be traced back to the end of Paleolithic and the beginning of Neolithic. After six or seven thousand years of domestication and cultivation, different varieties with unique economic benefits have been formed, which can meet some requirements of human beings and have adaptability to certain natural and economic conditions. There are only species and varieties of wild animals, but no varieties. African ostriches have been domesticated by humans for only 100 years, and large-scale farming has only begun in the last twenty or thirty years. Therefore, there are only three breeds of ostriches raised artificially, namely blue-necked ostriches, red-necked ostriches and African black ostriches.

On the vast and flat African prairie, being tall is a great advantage, because the enemy is easy to be found when approaching. Like giraffes, ostriches can be said to be a walking watchtower. Its neck accounts for half of the total height of 2.4 meters. Adult ostriches are not for their own safety, but to protect their eggs and young birds, because young birds are often threatened by wolves and other enemies.

Before mating, male and female ostriches will hold courtship ceremonies. They eat together, raise their heads and lower their heads rhythmically, and then the males show their love to the females. It will sit down, sway from side to side, show off its white feathers and twist its neck into a spiral to show its love. Several mated females will lay eggs in a nest, and then a dominant female will look after these eggs.

An adult ostrich can run 64 kilometers per hour. It protects itself with powerful claws. It has no feathers on its long legs and neck, which makes it easier for the body to dissipate heat. However, overheating is a very serious problem for large animals living in hot areas.

The ostrich family. When the chick first hatched, it was 30 cm tall. They can run almost immediately. Parents will deliberately use exaggerated actions to draw the enemy away from them.

Ostriches live in Africa, and there are other giant birds that can't fly in other parts of the world: llamas in South America and emus in Australia. Because they have similar lifestyles, their bodies have evolved very similarly.