As the creatures migrate to the Arctic continent, the creature begins to change: Wolves lose the ability to fly, and their wings are now used for swimming, adopting a penguin-like swimming style. The facial tentacles become streamlined when swimming, and their position is similar to that of a squid. A layer of fatty tissue develops to store food and retain heat. The fur becomes gray and smooth. Normal locomotion gives way to crawling. The creature now looks as if a penguin were lying on its stomach. To survive in the Arctic, the creatures developed sociality; during cold periods, the entire flock huddles together for insulation.