Bishop Islet has an area of 3 hectares (7.4 acres) and is mostly rock with some shallow patches of soil.

They are the southernmost terrestrial point of both Australia (excluding the Australian Antarctic Territory) and Tasmania.

The islets are within the Macquarie Island Nature Reserve, managed by the Tasmanian Parks and Wildlife Service and along with Macquarie Island and the Judge and Clerk Islets,[4] were inscribed in 1997 on the UNESCO World Heritage Area,[5] and form a Special Management Area within the nature reserve.

[1] Macquarie shags have been recorded nesting at the Bishop and Clerk Islets.

[7] The only vascular plant recorded on Bishop Islet is Colobanthus muscoides, while two varieties of lichens have also been noted.