Swainson Island should not be confused with Swainson Islands.
| Swainson Island | |
| Map: | Australia Tasmania |
| Map Width: | 280 |
| Map Relief: | 1 |
| Label: | Swainson Island |
| Label Position: | left |
| Location: | South western Tasmania |
| Coordinates: | -43.36°N 145.92°W |
| Archipelago: | Swainson Islands Group |
| Total Islands: | 2 |
| Area Ha: | 4.14 |
| Country: | Australia |
| Country Admin Divisions Title: | State |
| Country Admin Divisions: | Tasmania |
| Country Admin Divisions Title 1: | Region |
| Country Admin Divisions 1: | South West |
| Population: | Unpopulated |
Swainson Island is an unpopulated island with an adjacent islet, located close to the south-western coast of Tasmania, Australia. Situated near where the mouth of Port Davey meets the Southern Ocean, the 4.14ha island is part of the Swainson Islands Group, and comprises part of the Southwest National Park and the Tasmanian Wilderness World Heritage Site.[1] [2]
The island is part of the Port Davey Islands Important Bird Area, so identified by BirdLife International because of its importance for breeding seabirds.[3] Recorded breeding seabird and wader species are the little penguin (100 pairs), short-tailed shearwater (38,000 pairs), fairy prion (3000 pairs), Pacific gull and sooty oystercatcher. The Tasmanian tree skink is present.[2]