Adelaide and Mary River Floodplains
Encyclopedia
Floodplain
A floodplain, or flood plain, is a flat or nearly flat land adjacent a stream or river that stretches from the banks of its channel to the base of the enclosing valley walls and experiences flooding during periods of high discharge...
s of the Adelaide
Adelaide River
Adelaide River is a river in the Northern Territory of Australia. It starts in Litchfield National Park and flows generally northwards to Clarence Strait, being crossed by both the Stuart Highway and the Arnhem Highway...
and Mary Rivers
Mary River (Northern Territory)
The Mary River flows in the Northern Territory of Australia and is a site of the Mary River National Park. Its lower reaches form part of the Adelaide and Mary River Floodplains Important Bird Area.-External links:**...
of the Top End
Top End
The Top End of northern Australia is the second northernmost point on the continent. It covers a rather vaguely-defined area of perhaps 400,000 square kilometres behind the northern coast from the Northern Territory capital of Darwin across to Arnhem Land with the Indian Ocean on the west, the...
of Australia
Australia
Australia , officially the Commonwealth of Australia, is a country in the Southern Hemisphere comprising the mainland of the Australian continent, the island of Tasmania, and numerous smaller islands in the Indian and Pacific Oceans. It is the world's sixth-largest country by total area...
’s Northern Territory
Northern Territory
The Northern Territory is a federal territory of Australia, occupying much of the centre of the mainland continent, as well as the central northern regions...
. It lies east of the city of Darwin
Darwin, Northern Territory
Darwin is the capital city of the Northern Territory, Australia. Situated on the Timor Sea, Darwin has a population of 127,500, making it by far the largest and most populated city in the sparsely populated Northern Territory, but the least populous of all Australia's capital cities...
and west of Kakadu National Park
Kakadu National Park
Kakadu National Park is in the Northern Territory of Australia, 171 km southeast of Darwin.Kakadu National Park is located within the Alligator Rivers Region of the Northern Territory of Australia. It covers an area of , extending nearly 200 kilometres from north to south and over 100 kilometres...
and the Alligator Rivers
Alligator Rivers
The Alligator Rivers is the name of a region in the Arnhem Land region of the Northern Territory of Australia, containing three rivers the East, West and South Alligator River...
IBA, where the rivers flow northwards through seasonally inundated tropical lowlands into the Van Diemen Gulf
Van Diemen Gulf
Van Diemen Gulf is a gulf between Arnhem Land, of the attached Cobourg Peninsula and Melville Island in northern Australia. It is connected to the Timor Sea in the west by the Clarence Strait , and to the Arafura Sea in the north by Dundas Strait...
.
Birds
The floodplains have been identified by BirdLife InternationalBirdLife International
BirdLife International is a global Partnership of conservation organisations that strives to conserve birds, their habitats and global biodiversity, working with people towards sustainability in the use of natural resources...
as an Important Bird Area
Important Bird Area
An Important Bird Area is an area recognized as being globally important habitat for the conservation of bird populations. Currently there are about 10,000 IBAs worldwide. The program was developed and sites are identified by BirdLife International...
(IBA) because they support over 1% of the world populations of several species of waterbirds, including Magpie Geese (up to 800,000), Wandering Whistling Duck
Wandering Whistling Duck
The Wandering Whistling Duck is a species of whistling duck. They inhabit tropical and subtropical Australia, the Philippines, Indonesia, Papua New Guinea and the Pacific Islands . There are three subspecies associated with this bird. D. arcuata arcuata , D. arcuata australis , and D...
s (188,000), Pied Heron
Pied Heron
The Pied Heron , also known as the Pied Egret is a bird found in coastal and subcoastal areas of monsoonal northern Australia as well as some parts of Wallacea and New Guinea.-Taxonomy:...
s (2000), Red-necked Avocet
Red-necked Avocet
The Red-necked Avocet is a water bird found throughout Australia, except for the northern parts of the Northern Territory....
s (3000), Little Curlew
Little Curlew
The Little Curlew, Numenius minutus, is a wader in the large bird family Scolopacidae. It is a very small curlew, which breeds in the far north of Siberia. It is closely related to the North American Eskimo Curlew....
s (12,000), Eastern Curlews (1050), and Sharp-tailed Sandpiper
Sharp-tailed Sandpiper
The Sharp-tailed Sandpiper, Calidris acuminata is a small wader.- Taxonomy :More recently, a review of new data has indicated that this bird should perhaps better be placed into the genus Philomachus- as P...
s (2500). There are large breeding colonies containing 30,000 mixed waterbirds, significant numbers of Bush Stone-curlew
Bush Stone-curlew
The Bush Stone-curlew or Bush Thick-knee is a large, ground-dwelling bird endemic to Australia...
s and 11 species that either have restricted ranges or are confined to savanna
Savanna
A savanna, or savannah, is a grassland ecosystem characterized by the trees being sufficiently small or widely spaced so that the canopy does not close. The open canopy allows sufficient light to reach the ground to support an unbroken herbaceous layer consisting primarily of C4 grasses.Some...
biome
Biome
Biomes are climatically and geographically defined as similar climatic conditions on the Earth, such as communities of plants, animals, and soil organisms, and are often referred to as ecosystems. Some parts of the earth have more or less the same kind of abiotic and biotic factors spread over a...
s.