Description Whether they are searching for food or finding somewhere safe to have babies, many animals migrate throughout the year. Find out about some of the animal kingdom's most amazing migrations!. . Animal Migrations is part of Decodables by Jump!, a comprehensive library of decodable leveled readers that follow a sequenced approach to phonics instruction. Young readers will enjoy colorful, photo-packed nonfiction as they follow a prescribed format supported by the science of reading that encourages reading development.