2.3. Mammals

     
 
 
  What is a mammal?
 
     
 
 

Mammals are vertebrates. They are born live. They drink their mother’s milk when they are babies.

  • All mammals breathe air.
  • Most mammals are land animals. However, some mammals, like dolphins, are aquatic.
  • Most mammals have hair on their bodies. However, aquatic mammals have bare skin.
  • Almost all mammals walk or swim. However, bats can fly.
     
     

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