The Adelaide and Mary River Floodplains are a 2,687 square kilometres (1,037 sq mi) region comprising the adjoining floodplains of the Adelaide and Mary Rivers in the Top End of Australia’s Northern Territory. It lies east of the city of Darwin and west of Kakadu National Park and the Alligator Rivers IBA, where the rivers flow northwards through seasonally inundated tropical lowlands into the Van Diemen Gulf.[1]