Thursday, August 23, 2012

Mammals in the Air Animals

   People often think bats are the scariest creatures in the world The more you know about them, the less frightening they are. 
      Bast are the only mammals that can fly . They have furry bodies and leathery wings made up of a double layer of thin skin, called membrane. Bird's wing are supported by one set of bones which reach along the top edge. But the bat's wings is supported  by both arm bones and spread-out finger bones.
         The membrane is stretched over the bones and joined to the leg for extra strength. As bats have wings like hands, they can easily change the shape of their wings to perform several types of acts or movements in the air , even of those types which most birds can't manage.
            When bats are resting, their wings fold up like an umbrella. Bats sometime put their heads inside their wings when sleeping. Most bats live in caves, usually in large groups called colonies, but they may live in barns or attics , and sometimes even in trees. Wherever they live, most bats spend a great deal of their time hanging upside down by their toes.
             When a mother bat gives birth to a baby, she turns the right way up , and hangs by her thumbs . She tucks her tail membrane between her leg to make a kind of safety net. The baby is born into the net. It stays with its mother for first few days, clinging on to her fur when she flies.

No comments:

Post a Comment