The Three Sisters Island or Three Sisters Islands are three small and rocky
granite
Granite () is a coarse-grained ( phaneritic) intrusive igneous rock composed mostly of quartz, alkali feldspar, and plagioclase. It forms from magma with a high content of silica and alkali metal oxides that slowly cools and solidifies under ...
island
An island (or isle) is an isolated piece of habitat that is surrounded by a dramatically different habitat, such as water. Very small islands such as emergent land features on atolls can be called islets, skerries, cays or keys. An island ...
s, with a collective land area of , located in the
Bass Strait, lying off the north coast of
Tasmania
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, image_map = Tasmania in Australia.svg
, map_caption = Location of Tasmania in AustraliaCoordinates:
, subdivision_type = Country
, subdi ...
, Australia, between the towns of Penguin, Tasmania, Penguin and Ulverstone, Tasmania, Ulverstone.
The islands are steep-sided. Their vegetation of sparse coastal scrub is largely limited to their summits. Because landings are difficult owing to the lack of beaches and safe anchoring points they are little affected by human visitation and disturbance, although Australian fur seals hauling-out, haul-out on the lowest of them. Along with the neighbouring Goat Island (Tasmania), Goat Island, they are part of the Three Sisters – Goat Island Nature Reserve.
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]
Birds
The island group has been identified as an Important Bird Area (IBA) by BirdLife International because, with up to 400 breeding pairs, it supports over 1% of the world population of black-faced cormorants.[BirdLife International. (2011). Important Bird Areas factsheet: Three Sisters (Bass Strait). Downloaded from http://www.birdlife.org on 2011-11-05.]
See also
* List of islands of Tasmania
References
Important Bird Areas of Tasmania
North West Tasmania
Islands of Bass Strait
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