Ostrich -- belonging to ostrich family of ostrichiformes,

 it is the largest bird in the world.

It is also the only two toed bird in the world

The ancestor of ostrich is also a kind of flying bird

Later, due to the change of living environment, 

it gradually evolved to be tall and good at running in the open grassland and desert.

Flight ability gradually decreases until it is lost

Hualong Science & Technology takes you to learn the evolutionary history of various animals,

and to look for the cause of extinction of dinosaurs.

We can also help you to create a new animal world