The Tooth Fairy and the Crocodile by Julia Donaldson

Ruth Mary the tooth fairy is used to collecting teeth from under the pillows of sleeping children, not animals. But when the Fairy Queen sends her off to the jungle, Ruth Mary doesn't mind.

Everything goes well until she collects the tooth of a crocodile, who wakes up and decides that Ruth Mary looks like a tasty snack . . .

and with her wings not working, how will the tooth fairy escape?