Ostrich is a kind of bird. Birds usually fly, don't they ?
Then, what helps birds fly ? One of the reasons is birds usually have light weight.
The ostrich, however, is not a very light-weight bird. Ostriches are actually the biggest kind of bird in the world and can weigh over 300lbs. Ostriches can't fly. It’s mostly because of their size and weight. Even though they can’t fly, ostriches still have wings !! The wings are used to help them stay steady while running. Did you know that ostriches are really fast runners? They can run at over 40 miles per hour.. It's very fast, isn't it ??
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