Birds also entertain humans with their song. The earthworm lets air into the soil. This makes the soil better for plants to grow. The hedgehog eats mice, small snakes and lizards and is totally harmless to humans. In Finland, people put a saucer of milk out at night for the hedgehog and its young.
Chameleons eat flies and mosquitoes.
They are totally harmless to people. Frogs and toads protect our gardens against lots of insects and do no damage. Some bats eat flies, mosquitoes and other insects. They do not harm people. Only the South American Vampire bat attack cattle.