penguins
Penguins (order Sphenisciformes) are seabirds. Are not "birds", but definitely are birds that have feathers. Perhaps more surprising to some people is that despite spending most of their time in the water of the sea and can not fly through the air like many other birds are birds of flight. Some species of penguins are kept most of their time swimming in the ocean far from land. This creates some difficulty for them. Fortunately during the breeding season coming ashore to nest and raise their chicks. Shortly after returning back to earth, or a floating ice floe, to change their feathers. It is during these breaks when we can observe.
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