Common murres (Uria aalge) dive to hunt for fish, and use their wings for both swimming underwater and flying in the air!
[Photo by Alycia Drwencke and caption by Karli Chudeau]
Watanuki, Y & Katsufumi, S. (2008). Dive angle, swim speed and wing stroke during shallow and deep dives in Common Murres and Rhinoceros Auklets. Ornithological Science 7(1), 15-28.