The Slaty-Backed Gull is a large white headed (often with streaks) Gull, with a white belly and tail, dark pink legs, yellow bill with orange-red sub-terminal spot, dark steak through eye, and a dark slaty-gray back. The wings have a broad white trailing edge. It has a range of Far East Asia and the western coast of Alaska, but travels widely during non-breeding seasons. It has a habitat that is mainly coastal and northeastern Asia. Its diet consists mainly of fish and invertebrates, such as crabs and sea urchins.