South Twin Island is an uninhabited Arctic

Arctic

The Arctic is a region located at the northern-most part of the Earth. The Arctic consists of the Arctic Ocean and parts of Canada, Russia, Greenland, the United States, Norway, Sweden, Finland, and Iceland. The Arctic region consists of a vast, ice-covered ocean, surrounded by treeless permafrost...

 island located east of Akimiski Island

Akimiski Island

Akimiski Island is the largest island in James Bay , Canada, which is part of the Qikiqtaaluk Region of the territory of Nunavut. It has an area of , making it the 163rd largest island in the world, and Canada's 29th largest island. Akimiski Island is only from the province of Ontario...

 toward the center of James Bay

James Bay

James Bay is a large body of water on the southern end of Hudson Bay in Canada. Both bodies of water extend from the Arctic Ocean. James Bay borders the provinces of Quebec and Ontario; islands within the bay are part of Nunavut...

. The larger, similarly-shaped, North Twin Island is located approximately 10 km northwest. South Twin Island has more mossy tundra

Tundra

In physical geography, tundra is a biome where the tree growth is hindered by low temperatures and short growing seasons. The term tundra comes through Russian тундра from the Kildin Sami word tūndâr "uplands," "treeless mountain tract." There are three types of tundra: Arctic tundra, alpine...

 and fewer trees than North Twin Island. The two islands are referred to as the Twin Islands

Twin Islands (Nunavut)

The Twin Islands are similarly shaped Arctic islands in the Qikiqtaaluk Region of Nunavut, Canada. They are located in central James Bay, north east of Akimiski Island, and west of Quebec. The group includes North Twin and South Twin islands.-Geography:Approximately separate the two islands...

, and are part of the Qikiqtaaluk Region of the Canadian

Canada

Canada is a North American country consisting of ten provinces and three territories. Located in the northern part of the continent, it extends from the Atlantic Ocean in the east to the Pacific Ocean in the west, and northward into the Arctic Ocean...

 territory of Nunavut

Nunavut

Nunavut is the largest and newest federal territory of Canada; it was separated officially from the Northwest Territories on April 1, 1999, via the Nunavut Act and the Nunavut Land Claims Agreement Act, though the actual boundaries had been established in 1993...

.

South Twin Island is an important breeding site for Canada Geese

Canada Goose

The Canada Goose is a wild goose belonging to the genus Branta, which is native to arctic and temperate regions of North America, having a black head and neck, white patches on the face, and a brownish-gray body....

 and Semipalmated Plover

Semipalmated Plover

The Semipalmated Plover is a small plover.This species weighs and measures in length and across the wings. Adults have a grey-brown back and wings, a white belly, and a white breast with one black neckband...

s.