Gannet -

: Special air sacs under the skin of their face and chest act as cushions, absorbing the shock of the water.

: They have no external nostrils, which prevents water from being forced into their lungs upon impact. gannet

: When partners reunite at the nest, they perform a "mutual fencing" ritual, wagging their bills and clacking them together to reestablish their bond. : Special air sacs under the skin of