Puffinus gavia  

Fluttering Shearwater (Puffinus gavia)
click photo for larger image
© Vik Dunis 2011
Off Port MacDonnell, SA (Jul, 2011)

Shearwaters are a specialised diving bird. They "fly" underwater using their wings, and their feet and tails function as rudders in a similar manner to penguins, awks and diving-petrels.

Other species of diving birds, namely cormorants, ducks, divers and grebes, swim underwater by paddling their feet.*

*Bird Behaviour by Robert Burton, 1985, p.27.

Fluttering Shearwater (Puffinus gavia)

Fluttering Shearwater