 It is part of the Canadian Arctic Archipelago, and had a population of 112 in 2011, all in Sachs Harbour.The island is treeless, with the tallest plant, the Arctic willow, growing occasionally to about the height of a person's knee but usually standing no taller than .Banks Island is home to two-thirds of the world's population of lesser snow geese, which make their way across the Amundsen Gulf from the mainland.