At about 10 months old, the beloved bird has begun fledging, or losing his fluffy baby feathers and gaining sleek adult ones ...

Pesto the massive king penguin chick has begun his molting process, losing the fluffy brown feathers which defined his look ...

King penguin chicks experience their first molt around 10 months old and the process can last up to six weeks, per the aquarium. Since molting requires baby chicks to use a lot of energy ...

Pesto the penguin, who lives at the Sea Life Aquarium in Melbourne, Australia, became a viral sensation for his ginormous size as a baby. The king penguin is now losing his baby feathers ...