Emperor Penguin

One of the most identifiable non-flying birds in the world is the emperor penguin. Emperor penguins only exist in Antarctica and spend time both inland and along the coasts. They travel over 100 kilometers interior to reproduce in the winter, one of the most unusual migrations on the entire planet. Males and females alternate turning over a single egg to raise the young until they are independent.

While some birds are able to fly and swim, the emperor penguin is particularly well-suited to water. Emperor penguins, according to Gizmodo, can stay underwater for roughly 20 minutes and may travel 1,650 feet through the ocean before needing to surface for oxygen. Additionally, an emperor penguin's feathers include small air-tight filaments. When they swim, air bubbles escape from their feathers, reducing drag and allowing them to move more quickly.