Chinstrap penguin Pygoscelis antarctica breeding colony at Baily Head on Deception Island, Antarctica, Southern Ocean. Chinstrap penguin Pygoscelis antarctica breeding colony at Baily Head on Deception Island, Antarctica, Southern Ocean MORE INFO The caldera at Baily Head holds one of the world´s largest chinstrap colonies There are an estimated 2 million breeding pairs of chinstrap penguins in the Antarctic Peninsula region alone, perhaps as many as 7 5 million breeding pairs in all of Antarc