Animals in the class Amphibia spend part of their lives under water and part on land. Frogs, toads, and salamanders are amphibians. Many of these species must keep their skin moist by periodically returning to wet areas. All of them must return to water in order to reproduce because their eggs would dry out otherwise.
He then meets Mittens (Susie Essman), a female alley cat who bullies pigeons out of their food. Bolt (believing she's one of Calico's minions) forces Mittens to help him get back to Penny, and after Bolt ends up knocking Mittens unconscious into a letter box, the two start their epic journey westward on a truck.
Pettigrew faked his own death (for which Sirius Black was blamed) and lived with the Weasley family in the form of Scabbers the rat until Sirius Black escaped Azkaban Prison and recognised him. The actor who plays Peter Pettigrew (in human form) in the Harry Potter film franchise is Timothy Spall.