The Lake Sylvester System comprises a system of ephemeral lakes on the

Barkly Tableland The Barkly Tableland is a region in the Central East of the Northern Territory, extending into Western Queensland. The region was named after Sir Henry Barkly. The epithet "Tableland" is inaccurate, since the region is neither elevated relative ...

of the

Northern Territory The Northern Territory (abbreviated as NT; known formally as the Northern Territory of Australia and informally as the Territory) is an states and territories of Australia, Australian internal territory in the central and central-northern regi ...

Australia Australia, officially the Commonwealth of Australia, is a country comprising mainland Australia, the mainland of the Australia (continent), Australian continent, the island of Tasmania and list of islands of Australia, numerous smaller isl ...

about 180 km north-east of

Tennant Creek Tennant Creek () is a town located in the Northern Territory of Australia. It is the Northern Territory#Cities and towns, seventh largest town in the Northern Territory, and is located on the Stuart Highway, just south of the intersection with ...

Description

The whole Sylvester system consists of Lakes de Burgh, Sylvester and Corella, with an unnamed basin to their west, linked by a network of interconnected wetlands. It includes two semi-permanent freshwater billabongs. Corella, de Burgh and Sylvester are ephemeral freshwater lakes which are seasonally inundated, sometimes retaining water for over a year after substantial flooding. At normal capacity the lakes are separate water bodies, though in wetter years they can fill and become connected. During exceptional flood events all water bodies in the system can merge to form a single lake with an area of up to 2000 km². The lake system lies on deep-cracking grey clay soils that support open

shrubland Shrubland, scrubland, scrub, brush, or bush is a plant community characterized by vegetation dominance (ecology), dominated by shrubs, often also including grasses, herbaceous plant, herbs, and geophytes. Shrubland may either occur naturally o ...

s and

savanna A savanna or savannah is a mixed woodland-grassland (i.e. grassy woodland) biome and ecosystem characterised by the trees being sufficiently widely spaced so that the canopy does not close. The open canopy allows sufficient light to reach th ...

woodland A woodland () is, in the broad sense, land covered with woody plants (trees and shrubs), or in a narrow sense, synonymous with wood (or in the U.S., the '' plurale tantum'' woods), a low-density forest forming open habitats with plenty of sunli ...

s with scattered coolibahs, tussock grasslands and mats of aquatic plants. The land forms part of the Brunette Downs

pastoral lease A pastoral lease, sometimes called a pastoral run, is an arrangement used in both Australia and New Zealand where government-owned Crown land is leased out to Pastoral farming, graziers for the purpose of livestock grazing on rangelands. Austral ...

operated by the

Australian Agricultural Company The Australian Agricultural Company (AACo; ) is a public-listed Australian company that, as of 2018, owns and operates feedlots and farms covering around of land in Queensland and the Northern Territory, roughly one percent of Australia's land ...

Birds

Some 2262 km² of the lake system and its surroundings have been identified as an

Important Bird Area An Important Bird and Biodiversity Area (IBA) is an area identified using an internationally agreed set of criteria as being globally important for the conservation of bird populations. IBA was developed and sites are identified by BirdLife Int ...

BirdLife International BirdLife International is a global partnership of non-governmental organizations that strives to conserve birds and their habitats. BirdLife International's priorities include preventing extinction of bird species, identifying and safeguarding i ...

because it has significant breeding colonies of the

letter-winged kite The letter-winged kite (''Elanus scriptus'') is a small, rare and Irruptive growth, irruptive bird of prey that is endemism, found only in Australia. Measuring around in length with a wingspan of , the adult letter-winged kite has predominantl ...

s and over 1% of the world populations of plumed whistling-ducks,

grey teal The grey teal (''Anas gracilis'') is a dabbling duck found in open wetlands in Australia and New Zealand. Description It can be identified due to the presence of a crimson coloured iris in its eyes. This crimson colour is relatively more promi ...

hardhead The hardhead (''Aythya australis''), also known as the white-eyed duck, is the only true diving duck found in Australia. The common name "hardhead" has nothing to do with the density of the bird's skull, instead referring to the difficulty encou ...

little black cormorant The little black cormorant (''Phalacrocorax sulcirostris'') is a member of the cormorant family of seabirds. It is common in smaller rivers and lakes throughout most areas of Australia and northern New Zealand, where it is known as the little bla ...

Australian pelican The Australian pelican (''Pelecanus conspicillatus'') is a large waterbird in the family Pelecanidae, widespread on the inland and coastal waters of Australia and New Guinea, also in Fiji, parts of Indonesia and as a vagrant in New Zealand. It ...

straw-necked ibis The straw-necked ibis (''Threskiornis spinicollis'') is a bird of the ibis and spoonbill family Threskiornithidae. It can be found throughout Australia, New Guinea, and parts of Indonesia. Adults have distinctive straw-like feathers on their neck ...

es,

Eurasian coot The Eurasian coot (''Fulica atra''), also known as the common coot, or Australian coot, is a member of the rail and crake bird family, the Rallidae. It is found in Europe, Asia, Australia, New Zealand and parts of North Africa. It has a slaty-bla ...

s, Oriental plovers, Australian terns and flock bronzewings. It also provides habitat for

Australian bustard The Australian bustard (''Ardeotis australis'') is a large ground-dwelling bird that is common in grassland, woodland and open agricultural country across northern Australia and southern New Guinea. It stands at about high, and its wingspan is a ...

s. When fully inundated, it may support up to a million

waterbird A water bird, alternatively waterbird or aquatic bird, is a bird that lives on or around water. In some definitions, the term ''water bird'' is especially applied to birds in freshwater ecosystems, although others make no distinction from seabi ...

References

{{coord, 18, 49, 01, S, 135, 38, 54, E, display=title, region:AU-NT_type:waterbody Important Bird Areas of the Northern Territory

Sylvester Sylvester or Silvester is a name derived from the Latin adjective ''silvestris'' meaning "wooded" or "wild", which derives from the noun ''silva'' meaning "woodland". Classical Latin spells this with ''i''. In Classical Latin, ''y'' represented a ...