Bats are the only mammals that can fly. There are about 1.000 kinds of bats. They eat insects for us. The sun hurts their eyes when they open them. They can see better at night because it is dark.
Bats eat insects that harm people.
I saw a bat in the tree last night. I was not scared of it. Bats do not harm people. The biggest bat is a flying fox bat. There are over one thousand bats in the world.