From 9-foot tall ostriches to albatrosses with gargantuan wingspans, here are some of the biggest birds in the world.

Pesto the massive king penguin chick has begun his molting process, losing the fluffy brown feathers which defined his look adored the world over on social media.

A huge king penguin chick named Pesto has become a social media celebrity and a star attraction at an Australian aquarium.