Seagull Island (Tiwi Islands)
Seagull Island is a 58 ha linear sand island, about 2.5 km long, lying 4 km off Cape Van Diemen on the north-west coast of Melville Island, in the Tiwi Island group, in the Northern Territory of Australia. It is an important breeding site for seabirds.
The island has been identified by BirdLife International as an Important Bird Area (IBA) because it supports the largest colony of greater crested terns in the world, with up to 29,000 nests recorded there. Tern eggs are harvested by the island's traditional owners. Up to 800 silver gulls also nest on the island, and possibly bridled and roseate terns. Large numbers of migrant common and little terns roost there, as do smaller numbers of frigatebirds and brown boobies.