Wandering Albatross
Diomedea exulans

The Wandering Albatross is the largest of all albatrosses and one of the largest birds in the world. It has a wingspan of up to 3.5 metres. The first three are adults and the last is a juvenile.
 

1 and 4: South Pacific, off Sydney, 13/03/2010.
2 and 3: South Pacific, off Sydney, 14/08/2010.