Fossils of birds from this time period are rare, with baby fossils seen as "the rarest ... which hatch with no feathers and their eyes shut, meaning they need parental care. The research ...

In a kind of bird puberty, Pesto is losing his baby feathers and adult feathers are taking their place. While king penguin ...

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

aided by his fluffy baby feathers and actual size. Outside of his sizable appetite — Pesto eats around 25 fish a day — Sea Life attributes the bird's size to his biological dad, Blake ...