Adult macaroni penguins Eudyptes chrysolophus plunging into the sea leaving their breeding colony at Elsehul on South Georgia, Southern Ocean. Adult macaroni penguins Eudyptes chrysolophus plunging into the sea leaving their breeding colony at Elsehul on South Georgia, Southern Ocean MORE INFO Numbering up to 100,000 individuals, the breeding colonies of the macaroni penguin are among the largest and densest of all penguin species With about 18 million individuals, the macaroni penguin is the