Lake Yamma Yamma is an

ephemeral Ephemerality (from the Greek word , meaning 'lasting only one day') is the concept of things being transitory, existing only briefly. Academically, the term ephemeral constitutionally describes a diverse assortment of things and experiences, fr ...

lake A lake is an area filled with water, localized in a basin, surrounded by land, and distinct from any river or other outlet that serves to feed or drain the lake. Lakes lie on land and are not part of the ocean, although, like the much large ...

on the

Cooper Creek The Cooper Creek (formerly Cooper's Creek) is a river in the Australian states of Queensland and South Australia. It was the site of the death of the explorers Burke and Wills in 1861. It is sometimes known as the Barcoo River from one of its t ...

system in the

arid A region is arid when it severely lacks available water, to the extent of hindering or preventing the growth and development of plant and animal life. Regions with arid climates tend to lack vegetation and are called xeric or desertic. Most ...

Channel Country The Channel Country is a region of outback Australia mostly in the state of Queensland but also in parts of South Australia, Northern Territory and New South Wales. The name comes from the numerous intertwined rivulets that cross the region, ...

of south-western

Queensland ) , nickname = Sunshine State , image_map = Queensland in Australia.svg , map_caption = Location of Queensland in Australia , subdivision_type = Country , subdivision_name = Australia , established_title = Before federation , establishe ...

, Australia. The lake, which is sometimes called Lake Mackillop, is the largest inland ephemeral lake in Queensland.

Description

The lake only holds water following major floods on Cooper Creek. When filled the lake covers . It fills to capacity only about once every 25–30 years, most recently in 2000. The lake waters are fresh immediately after filling, but become increasingly saline as the lake dries out. When dry, the lake bed's cracking grey clay soils support extensive

grassland A grassland is an area where the vegetation is dominated by grasses ( Poaceae). However, sedge ( Cyperaceae) and rush ( Juncaceae) can also be found along with variable proportions of legumes, like clover, and other herbs. Grasslands occur na ...

s dominated by rat's tail couch. Several ephemeral

forb A forb or phorb is an herbaceous flowering plant that is not a graminoid (grass, sedge, or rush). The term is used in biology and in vegetation ecology, especially in relation to grasslands and understory. Typically these are dicots without woo ...

s grow among the couch following rain or minor flooding. The north-eastern section supports open lignum shrubland with patches of open

woodland A woodland () is, in the broad sense, land covered with trees, 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 sunlight and limited shade (se ...

dominated by coolabah and Belalie.BirdLife International. (2011.) Important Bird Areas factsheet: Lake Yamma Yamma. Downloaded from http://www.birdlife.org on 02/08/2011.

Birds

The lake, with its associated seasonal claypans and the nearby Barrolka Lakes to the north-east, has been identified by BirdLife International as a Important Bird Area (IBA) because it has supported over 1% of the world populations of

plumed whistling-duck The plumed whistling duck (''Dendrocygna eytoni''), also called the grass whistling duck, is a whistling duck that breeds in Australia. It is a predominantly brown-coloured duck with a long neck and characteristic plumes arising from its flank ...

sharp-tailed sandpiper The sharp-tailed sandpiper (''Calidris acuminata'') (but see below) is a small wader. Taxonomy A review of data has indicated that this bird should perhaps better be placed into the genus ''Philomachus'' – as ''P. acuminatus'' – which now ...

s and

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 ...

s, as well as providing habitat for

Australian bustard The Australian bustard (''Ardeotis australis'') is a large ground dwelling bird which 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 ...

s. A large

colony In modern parlance, a colony is a territory subject to a form of foreign rule. Though dominated by the foreign colonizers, colonies remain separate from the administration of the original country of the colonizers, the '' metropolitan state' ...

of Australian pelicans breeds on an island at the north-eastern end of the lake. The Barrolka Lakes hold several cormorant colonies. Other birds recorded in substantial numbers include

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 ...

s, white-headed stilts,

glossy ibis The glossy ibis (''Plegadis falcinellus'') is a water bird in the order Pelecaniformes and the ibis and spoonbill family Threskiornithidae. The scientific name derives from Ancient Greek ''plegados'' and Latin, ''falcis'', both meaning "sickle" a ...

es,

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.Winter, M. (2018). Grey Teal. Wilderness Mag ...

black-tailed nativehen The black-tailed nativehen (''Tribonyx ventralis'') is a rail native to Australia. Description The black-tailed nativehen is a large dark bird, reaching about 38 cm in length and weighing around 400 g. This species possesses an erect tail ...

Australian pratincole The Australian pratincole (''Stiltia isabella'') is a species of bird in the family Glareolidae. It breeds in Australia's interior; it winters to northern and eastern parts of the continent, Indonesia and New Guinea. It is a medium-sized nomadic ...

whiskered tern The whiskered tern (''Chlidonias hybrida'') is a tern in the family Laridae. The genus name is from Ancient Greek ''khelidonios'', "swallow-like", from ''khelidon'', "swallow". The specific ''hybridus'' is Latin for ''hybrid''; Peter Simon Palla ...

s and

Pacific black duck The Pacific black duck (''Anas superciliosa''), commonly known as the PBD, is a dabbling duck found in much of Indonesia, New Guinea, Australia, New Zealand, and many islands in the southwestern Pacific, reaching to the Caroline Islands in the no ...

s, with smaller numbers of

freckled duck The freckled duck (''Stictonetta naevosa)'' is a waterfowl species endemic to Australia. The freckled duck has also been referred to as the monkey duck or oatmeal duck. These birds are usually present in mainland Australia, but disperse to coas ...

s and white-winged black terns.

References

{{reflist Important Bird Areas of Queensland Yamma Yamma Lake Eyre basin South West Queensland Yamma Yamma, Lake

Description

Birds

See also

References