1) Cats and dogs have dreams. You will see that while they are sleeping, they might move their legs or heads. They might be dreaming about chasing mice or playing fetch!
2) Bats have very bad eyesight. To hunt, bats use echolocation. Bats send signals that we can't hear through their mouths. Then, when the signal echoes back to their ears, they will know if there are any tasty insects to eat. Bats depend on their hearing and sense of smell more than their eyesight.
3) The bat is the only flying mammal