"We see an average of 12 to 20 eagles on every trip," said Jon Borreson. "We've got a couple eagles nests that we can pull up ...

As so many across the world watch the baby eagles in Big Bear, California, David Muir reports on Sunny returning to the nest and reuniting with her sister, Gizmo.

Prepare for an epic clash between two of the most majestic and powerful eagles on Earth! Who would win in a fierce showdown — the iconic American Bald Eagle or the rare and mighty Philippine Eagle?