The Thumbs is a small and jagged island, with three prominent spires and an area of 4,500 square metres (1.1 acres), in south-eastern Australia.
[1] Recorded breeding seabird species are common diving-petrel and black-faced cormorant.
Australian fur seals use the island as a haul-out site.
[1] 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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