 The Sugarloaf Rock is part of the Southwest National Park and the Tasmanian Wilderness World Heritage Site.The island is part of the Port Davey Islands Important Bird Area, so identified by BirdLife International because of its importance for breeding seabirds.Recorded breeding seabird and wader species are the short-tailed shearwater (15,000 pairs), fairy prion (2000 pairs), silver gull and sooty oystercatcher.