Island bird or so-called island two is located in Banten Bay, located on the north or the south eastern city of Attacking Old Banten region. Once the island is separated from Java by 500m wide strait. If the receding tide, the island was united with the mainland Java. Over time, due to silting Cibanten River, the boundary between this island became unclear. Especially now, silt ponds that used by the locals. Fusion of these two islands is not a unique thing in the world of geology, and commonly referred to as the formation of Tombolo. Tombolo typically appears when the distance is smaller than the width of the strait islands, the sea is relatively shallow depths, the flow in one direction or the source of sedimentation. The island is a nature reserve managed by the Natural Resources Conservation Center (BKSDA). Bird Island is an area that is in the midst of the waters was not, or the island bird island was still together with two other mainland. The number of birds on this island more than 14 thousand heads of 108 species by the number of migrants of about 29 species. Migrants are expected from Australia, Japan, or Hong Kong it was just looking for food, in flight is pretty much it for the winter. Come thin, when it's fat go again. Only the local birds that lay eggs and breed there.