Giúp mk với

The entire wing of a bat is called the patagium. Many species also have a membrane between their hind limbs enclosing the tail.The patagium is full of fine blood vessels, muscle fibres and nerves. When it is cold, these bats wrap themselves up in their wings like a coat. In warm weather they flap their wings in order to cool their bodies.

The bat has claws on its thumbs and sometimes on the toes of its fore and hind limbs. The rear claws enable it to hang itself on to a tree branch or ledge.

All bats are active at night or at twilight, so their eyes are poorly developed. Instead they use their nose and ears to orientate themselves .