Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The chinstrap penguin, scientifically known as Pygoscelis antarcticus is a small species of penguin belonging to the genus Pygoscelis, found in the islands of the Antarctic Ocean. Described as one of the most abundant and aggressive penguin species, chinstrap penguins are believed to number more than 7 million breeding pairs. Nevertheless, a new study published in the journal Polar Biology, shows a chinstrap penguin population decline of 36 % since 1991, linking it to global warming and krill population decline – chinstrap penguins’ main food. Learn more about chinstrap penguins in this book.