The Thumbs is a small and jagged island, with three prominent spires and an area of 4500 square metres (1.1 acre), 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 the Tasman Island Group, lying close to the south-eastern coast 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...

 around the Tasman Peninsula

Tasman Peninsula

Tasman Peninsula is located around by road south-east of Hobart, at the south east corner of Tasmania, Australia.-Description:The Tasman Peninsula lies south and west of Forestier Peninsula, to which it is connected by an isthmus called Eaglehawk Neck...

, and is in the Tasman National Park

Tasman National Park

Tasman National Park is located in eastern Tasmania, Australia, 56 kilometres east of Hobart.-History:The park was proclaimed under the Regional Forest Agreement on 30 April 1999. The Tasman Island Lighthouse is located on Tasman Island, which is part of the park...

.

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...

 species are Common Diving-Petrel and Black-faced Cormorant

Black-faced Cormorant

The Black-faced Cormorant , also known as the Black-faced Shag, is a medium-sized member of the cormorant family. Upperparts, including facial skin and bill, are black, with white underparts. It is endemic to coastal regions of southern Australia.-Ecology:The Black-faced-Cormorant feeds largely on...

. Australian Fur Seals use the island as a haul-out

Hauling-out

Hauling-out is the behaviour associated with pinnipeds , of temporarily leaving the water between periods of foraging activity for sites on land or ice...

 site. Together, The Thumbs and the nearby Hippolyte Rocks

Hippolyte Rocks

Hippolyte Rocks is a small granite island, with an area of 5.3 ha, in south-eastern Australia. It is part of the Tasman Island Group, lying close to the south-eastern coast of Tasmania around the Tasman Peninsula. It has a flat top and is surrounded by steep cliffs up to 65 m in height...

 have been identified by BirdLife International

BirdLife International

BirdLife International is a global Partnership of conservation organisations that strives to conserve birds, their habitats and global biodiversity, working with people towards sustainability in the use of natural resources...

 as an Important Bird Area

Important Bird Area

An Important Bird Area is an area recognized as being globally important habitat for the conservation of bird populations. Currently there are about 10,000 IBAs worldwide. The program was developed and sites are identified by BirdLife International...

(IBA) because they support over 1% of the world population of Black-faced Cormorants.