Can All Birds Fly?

You probably think that all birds can fly. As a matter of fact, some birds with wings, such as ostriches, can’t fly.

Ostrich is the biggest bird on land. it is over two metres tall and sometimes weighs more than 150 kilogrammes. ostrich is W too heavy to fly. Although ostrich can't fly, it can run 60 kilomertes per hour, as fast as a bus.

The fat penguin can't fly either, but it can swim rapidly. Birds like cassowary and kiwi can't fly either.