The Thumbs is a small and jagged island, with three prominent spires and an area of , 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, and is in the Tasman National Park.Brothers, Nigel; Pemberton, David; Pryor, Helen; & Halley, Vanessa. (2001). Tasmania’s Offshore Islands: seabirds and other natural features. Tasmanian Museum and Art Gallery: Hobart.
Fauna Recorded breeding seabird species are common diving-petrel and black-faced cormorant. Australian fur seals use the island as a haul-out site. Together, The Thumbs and the nearby Hippolyte Rocks have been identified by BirdLife International as an Important Bird Area (IBA) because they support over 1% of the world population of black-faced cormorants.
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