Rum Island is a granite

Granite

Granite is a common and widely occurring type of intrusive, felsic, igneous rock. Granite usually has a medium- to coarse-grained texture. Occasionally some individual crystals are larger than the groundmass, in which case the texture is known as porphyritic. A granitic rock with a porphyritic...

 island, with an area of 13.5 ha

Hectare

The hectare is a metric unit of area defined as 10,000 square metres , and primarily used in the measurement of land. In 1795, when the metric system was introduced, the are was defined as being 100 square metres and the hectare was thus 100 ares or 1/100 km2...

, just south of Preservation Island

Preservation Island

Preservation Island is a low and undulating granite and calcarenite island, with an area of 207 ha, in south-eastern Australia. It is part of Tasmania’s Preservation Island Group, lying in eastern Bass Strait south-west of Cape Barren Island in the Furneaux Group, and is an important historic...

 in south-eastern Australia

Australia

Australia , officially the Commonwealth of Australia, is a country in the Southern Hemisphere comprising the mainland of the Australian continent, the island of Tasmania, and numerous smaller islands in the Indian and Pacific Oceans. It is the world's sixth-largest country by total area...

. It is part of Tasmania

Tasmania

Tasmania is an Australian island and state. It is south of the continent, separated by Bass Strait. The state includes the island of Tasmania—the 26th largest island in the world—and the surrounding islands. The state has a population of 507,626 , of whom almost half reside in the greater Hobart...

’s Preservation Island Group, lying in eastern Bass Strait

Bass Strait

Bass Strait is a sea strait separating Tasmania from the south of the Australian mainland, specifically the state of Victoria.-Extent:The International Hydrographic Organization defines the limits of the Bass Strait as follows:...

 south-west of Cape Barren Island in the Furneaux Group. It is part of the Sydney Cove

Sydney Cove (ship)

Sydney Cove was a sailing ship wrecked in 1797 on Preservation Island off Tasmania while on her way from Calcutta to Port Jackson. She was among the first ships wrecked on the east coast of Australia.- Voyage :...

historic site

Historic site

A historic site is an official location where pieces of political, military or social history have been preserved. Historic sites are usually protected by law, and many have recognized with the official national historic site status...

.

Fauna

Recorded breeding seabird

Seabird

Seabirds are birds that have adapted to life within the marine environment. While seabirds vary greatly in lifestyle, behaviour and physiology, they often exhibit striking convergent evolution, as the same environmental problems and feeding niches have resulted in similar adaptations...

 and wader

Wader

Waders, called shorebirds in North America , are members of the order Charadriiformes, excluding the more marine web-footed seabird groups. The latter are the skuas , gulls , terns , skimmers , and auks...

 species include Little Penguin

Little Penguin

The Little Penguin is the smallest species of penguin. The penguin, which usually grows to an average of in height and in length , is found on the coastlines of southern Australia and New Zealand, with possible records from Chile.Apart from Little Penguins, they have several common names...

, Short-tailed Shearwater

Short-tailed Shearwater

The Short-tailed Shearwater or Slender-billed Shearwater , also called Yolla or Moonbird, and commonly known as the muttonbird in Australia, is the most abundant seabird species in Australian waters, and is one of the few Australian native birds in which the chicks are commercially harvested...

, Pacific Gull

Pacific Gull

The Pacific Gull is a very large gull, native to the coasts of Australia. It is moderately common between Carnarvon in the west, and Sydney in the east, although it has become scarce in some parts of the south-east, as a result of competition from the Kelp Gull, which has "self-introduced" since...

, Sooty Oystercatcher

Sooty Oystercatcher

The Sooty Oystercatcher, Haematopus fuliginosus, is a species of oystercatcher. It is a wading bird native to Australia and commonly found on its coastline. It prefers rocky coastlines, but will occasionally live in estuaries....

 and Caspian Tern

Caspian Tern

The Caspian Tern is a species of tern, with a subcosmopolitan but scattered distribution. Despite its extensive range, it is monotypic of its genus, and has no subspecies accepted either...

. The Metallic Skink

Metallic Skink

The Metallic Cool-skink or Metallic Skink is a species of skink in the Scincidae family. It is endemic to Australia, found in southern Victoria, as well as in Tasmania where it is the most widespread and common lizard, occurring on many offshore islands in Bass Strait as well as the mainland. It...

 is present on the island.

Other islands in the Preservation Group with breeding seabirds include:

• Night Island
  Night Island (Tasmania)
  Night Island is a small granite island, with an area of 2.59 ha, in south-eastern Australia. It is part of Tasmania’s Preservation Island Group, lying in eastern Bass Strait south of Cape Barren Island in the Furneaux Group. It is a Conservation Area...
  
  
• Preservation Island
  Preservation Island
  Preservation Island is a low and undulating granite and calcarenite island, with an area of 207 ha, in south-eastern Australia. It is part of Tasmania’s Preservation Island Group, lying in eastern Bass Strait south-west of Cape Barren Island in the Furneaux Group, and is an important historic...
  
  
• Preservation Islets
  Preservation Islets
  The Preservation Islets are a close group of small granite islands, with a combined area of 0.93 ha, just north-west of Preservation Island in south-eastern Australia...