Vampire bats suck blood from animals, not people. Bats are helpful to us and the rain forest. Bats are mammals. Most bats eat bugs or fruit. If we didn't have bats we would have thousands of bugs.
Bats also help pollinate flowers.
Bats help people by eating hundreds of insects all night long. Bats use echolocation to fly at night. They see in black and white. They sleep in caves and mines. Some bats help us and some bats don't.