Seagull Island (Tiwi Islands)

It is a nesting site for olive ridley sea turtles.

[1] 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.

[2] 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.