[1] The island is broadly triangular in shape, some 3 kilometres (1.9 mi) across, with cliffs ranging from 250 to 300 metres (820 to 980 ft) high to the south on all sides except a part of the central north coast.

The highest parts of the island are located very close to the south coast, and enclose a north-facing basin.

[3] Although currently uninhabited, it has a long history of human usage, including logging and occasional habitation.

[5] The island is extensively forested with the principal species being Eucalyptus nitida, swamp gum and messmate.

Mammals present include the Tasmanian pademelon, long-nosed potoroo and swamp rat.