The Great Auk, Pinguinus impennis, formerly of the genus Alca, is a bird that became extinct in the mid-19th century. It was the only species in the genus Pinguinus - a group of birds that included several flightless giant auks from the Atlantic Ocean region - to survive until modern times. The Great Auk was also known as a garefowl (from the Old Norse geirfugl, meaning "spear-bird", referring to the shape of its beak) and penguin...