2.4. Birds

     
 
 
  What is a bird?
  
     

 

Birds are vertebrates. They are born from eggs. They have feathers on their bodies.

  • All birds breathe air.
  • Birds have two legs and two wings. All birds have wings. However, not all birds can fly, for example, penguins.
  • Many birds, such as sparrows, live on land. They can fly and walk.
  • Other birds, such as ducks, live on land and water. They can fly, swim and walk.
   
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