How Diving Ducks Swim With Their Wings

Common eider swims with its wings (screenshot from BBC video)

We know that ducks swim with their feet but when a diving duck needs to get somewhere fast, it flies underwater with its wings.

The BBC Earth video below shows common eiders (Somateria mollissima) at an Arctic polynya, diving to eat mussels.

Watch them swim with their wings.

(video from BBC Earth)