A piece from the American Institute of Physics points out that Gentoo penguins are the fastest swimming birds in the ... use the ratio of wing flapping speed to forward speed.

Whereas top-level athletes can swim at 8 kph or so, the speed of gentoo penguins--the fastest penguin variety--is known to reach more than 30 kph. The penguins’ secret lies in the motion of ...

A gentoo penguin chick that hatched at The Deep in Hull has taken its first swim. The chick hatched on 9 June and took its first splash at the aquarium on 16 August, weighing in at a "healthy" 10 ...