| De Witt Island | |
| Sobriquet: | Big Witch |
| Map: | Australia Tasmania |
| Map Width: | 280 |
| Map Relief: | 1 |
| Label: | De Witt Island |
| Label Position: | left |
| Coordinates: | -43.59°N 146.35°W |
| Etymology: | Cornelis Jan Witsen, a Commissioner of the Dutch East India Company[1] |
| Location: | South West Tasmania |
| Waterbody: | Southern Ocean |
| Area Ha: | 516 |
| Length M: | --> |
| Width Km: | 3 |
| Coastline M: | --> |
| Elevation M: | 340 |
| Elevation Footnotes: | [2] |
| Country: | Australia |
| Country Admin Divisions Title: | State |
| Country Admin Divisions: | Tasmania |
| Country Admin Divisions Title 1: | Region |
| Country Admin Divisions 1: | South West |
| Country Area M2: | or |
| Country Area Ha: | --> |
| Country 1 Area M2: | or |
| Country 1 Area Ha: | --> |
| Population: | Unpopulated |
| Additional Info: | Register of the National Estate |
De Witt Island, also known as Big Witch, is an island located close to the south-western coast of Tasmania, Australia. The 516ha island is the largest of the Maatsuyker Islands Group, and comprises part of the Southwest National Park and the Tasmanian Wilderness World Heritage Site. The island is listed on the Australian Register of the National Estate.
De Witt Island lies some south of Louisa Bay, on Tasmania's south coast. Abel Tasman discovered it in 1642 and named it Witsen or Wits Eijlanden. The island is broadly triangular in shape, some across, with cliffs ranging from 250to high to the south on all sides except a part of the central north coast. The highest parts of the island are located very close to the south coast, and enclose a north-facing basin. The island's 340m (1,120feet) summit is located very closeto its southernmost point. Although currently uninhabited, it has a long history of human usage, including logging and occasional habitation.[3] [4] The island is part of the Maatsuyker Island Group Important Bird Area, identified as such by BirdLife International because of its importance as a breeding site for seabirds.[5]
The island is extensively forested with the principal species being Eucalyptus nitida, swamp gum and messmate. Sheltered areas also have leatherwood and myrtle beech.
Recorded breeding seabird and wader species are the little penguin (500 pairs), short-tailed shearwater (11,000 pairs), fairy prion (50 pairs), silver gull and sooty oystercatcher. Swift parrots have been recorded. Mammals present include the Tasmanian pademelon, long-nosed potoroo and swamp rat. Reptiles recorded are the metallic skink and Tasmanian tree skink.