| West Moncoeur Island | |
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| Map: | Australia Tasmania |
| Map Width: | 280 |
| Map Relief: | 1 |
| Coordinates: | -39.2333°N 146.5056°W |
| Location: | Bass Strait |
| Area Ha: | 9 |
| Area M2: | or |
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| Country: | Australia |
| Country Admin Divisions Title: | State |
| Country Admin Divisions: | Tasmania |
| Country Area M2: | or |
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West Moncoeur Island is a granite island, ringed by steep cliffs, with an area of 9.18 ha, in south-eastern Australia. It is part of Tasmania’s Rodondo Group, lying in northern Bass Strait south of Wilsons Promontory in Victoria. It is a nature reserve.
The island was sighted by Lieutenant James Grant on 9 December 1800 from the survey brig HMS Lady Nelson and named after "Captain Moncur of the Royal navy".[1]
Recorded breeding seabird and wader species include short-tailed shearwater, fairy prion, common diving-petrel, Pacific gull, and sooty oystercatcher. The island is part of the Wilsons Promontory Islands Important Bird Area, identified as such by BirdLife International because of its importance for breeding seabirds.[2] The metallic skink is present. The island holds an important breeding colony of Australian fur seals, with about 250 pups being born there annually.[3]