The Cadell and Blyth Floodplains consist of the

floodplain A floodplain or flood plain or bottomlands is an area of land adjacent to a river. Floodplains stretch from the banks of a river channel to the base of the enclosing valley, and experience flooding during periods of high Discharge (hydrolog ...

of the lower reaches of the Blyth and Cadell Rivers of northern

Arnhem Land Arnhem Land is a historical region of the Northern Territory of Australia. It is located in the north-eastern corner of the territory and is around from the territorial capital, Darwin, Northern Territory, Darwin. In 1623, Dutch East India Compa ...

in the

Top End The Top End of Australia's Northern Territory is a geographical region encompassing the northernmost section of the Northern Territory, which aside from the Cape York Peninsula is the northernmost part of the Australian continent. It covers a ...

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 ...

. It is an important site for

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 ...

Description

The combined floodplain of the Blyth and Cadell rivers meets Boucaut Bay between

Milingimbi Island Milingimbi Island, also Yurruwi, is the largest island of the Crocodile Islands group off the coast of Arnhem Land, Northern Territory, Australia. Location Milingimbi lies approximately east of Darwin and west of Nhulunbuy. History Aborigin ...

to the east and the Maningrida community to the west. Copious seasonal flows down the rivers inundate the floodplain with over a metre of water in wetter years. The coast of the bay is characterised by

intertidal The intertidal zone or foreshore is the area above water level at low tide and underwater at high tide; in other words, it is the part of the littoral zone within the tidal range. This area can include several types of habitats with various sp ...

mud, sand and salt

flats Flat or flats may refer to: Architecture * Apartment, known as a flat in the United Kingdom, Ireland, and other Commonwealth countries Arts and entertainment * Flat (music), a symbol () which denotes a lower pitch * Flat (soldier), a two-dimens ...

as well as

mangrove A mangrove is a shrub or tree that grows mainly in coastal saline water, saline or brackish water. Mangroves grow in an equatorial climate, typically along coastlines and tidal rivers. They have particular adaptations to take in extra oxygen a ...

s, while the riverine plain is fringed by

paperbark ''Melaleuca'' () is a genus of nearly 300 species of plants in the myrtle family, Myrtaceae, commonly known as paperbarks, honey-myrtles, bottlebrushes or tea-trees (although the last name is also applied to species of '' Leptospermum''). They ...

forests and woodlands. Land tenure is traditionally owned Aboriginal land.BirdLife International. (2011). Important Bird Areas factsheet: Cadell and Blyth Floodplains. Downloaded from on 14 December 2011.

Birds

The floodplain, with the adjoining coast of Boucaut Bay, has 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 ...

(IBA) by

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 supported over 1% of the world populations of

pied heron The pied heron (''Egretta picata''), 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 The species was originally described by ...

brolga The brolga (''Antigone rubicunda''), formerly known as the native companion, is a bird in the crane (bird), crane family. It has also been given the name Australian crane, a term coined in 1865 by well-known ornithology, ornithologist John Gou ...

s and

great knot __NOTOC__ The great knot (''Calidris tenuirostris'') is a small wader. It is the largest species of the genus ''Calidris''. They are a migratory bird which breeds in Siberia, Russia, and flies to southern Asia and Australia in the northern winte ...

s. The large numbers of

wader 245px, A flock of Red_knot.html" ;"title="Dunlins and Red knot">Dunlins and Red knots Waders or shorebirds are birds of the order Charadriiformes commonly found wikt:wade#Etymology 1, wading along shorelines and mudflats in order to foraging, ...

s, or shorebirds, recorded at Boucaut Bay include over 1% of the world populations of great knots and

pied oystercatcher The pied oystercatcher (''Haematopus longirostris'') is a species of oystercatcher. It is a wading bird native to Australia and commonly found on its coastline. The similar South Island pied oystercatcher (''H. finschi'') occurs in New Zealand. ...

s. Other waterbirds using the floodplain and the

mudflat Mudflats or mud flats, also known as tidal flats or, in Ireland, slob or slobs, are coastal wetlands that form in intertidal areas where sediments have been deposited by tides or rivers. A global analysis published in 2019 suggested that tidal ...

s of the bay in relatively large numbers include

little pied cormorant The little pied cormorant, little shag or kawaupaka (''Microcarbo melanoleucos'') is a common species of Australasian waterbird, found around the coasts, islands, Estuary, estuaries, and inland waters of Australia, New Guinea, New Zealand, Timor- ...

great egret The great egret (''Ardea alba''), also known as the common egret, large egret, great white egret, or great white heron, is a large, widely distributed egret. The four subspecies are found in Asia, Africa, the Americas, and southern Europe. R ...

black-tailed godwit The black-tailed godwit (''Limosa limosa'') is a large, long-legged, long-billed shorebird first described by Carl Linnaeus in 1758. It is a member of the godwit genus, '' Limosa''. There are four subspecies, all with orange head, neck and ches ...

red-necked stint The red-necked stint (''Calidris ruficollis'') is a small migratory wader. The genus name is from Ancient Greek ''kalidris'' or ''skalidris'', a term used by Aristotle for some grey-coloured waterside birds. The specific ''ruficollis'' is from La ...

magpie geese The magpie goose (''Anseranas semipalmata'') is the sole living representative species of the family Anseranatidae. This common waterbird is found in northern Australia and southern New Guinea. As the species is prone to wandering, especially wh ...

and

whistling duck The whistling ducks or tree ducks are a subfamily, Dendrocygninae, of the duck, goose and swan family of birds, Anatidae. In other taxonomic schemes, they are considered a separate family, Dendrocygnidae. Some taxonomists list only one genus, ...

Asian dowitcher The Asian dowitcher (''Limnodromus semipalmatus'') is a rare medium-large wader. Description Adults have dark legs and a long straight dark bill, somewhat shorter than that of the long-billed dowitcher. The body is brown on top and reddish under ...

s visit in small numbers.

Chestnut rail The chestnut rail (''Eulabeornis castaneoventris'') is a species of bird in the family Rallidae. It is the only species in the genus ''Eulabeornis''. It is found in the Aru Islands and northern Australia. Its natural habitat is subtropical or t ...

s are present.

Biome A biome () is a distinct geographical region with specific climate, vegetation, and animal life. It consists of a biological community that has formed in response to its physical environment and regional climate. In 1935, Tansley added the ...

-restricted

passerine A passerine () is any bird of the order Passeriformes (; from Latin 'sparrow' and '-shaped') which includes more than half of all bird species. Sometimes known as perching birds, passerines generally have an anisodactyl arrangement of their ...

s recorded at the site include white-gaped and

bar-breasted honeyeater The bar-breasted honeyeater (''Ramsayornis fasciatus'') is a species of bird in the family Meliphagidae. It is endemic to northern Australia Australia, officially the Commonwealth of Australia, is a country comprising mainland Australia ...

s, and

long-tailed finch The long-tailed finch (''Poephila acuticauda'') is a common species of estrildid finch found in northern Australia, from the Kimberley (Western Australia), Kimberley region to the Gulf of Carpentaria. It is a predominantly fawn-coloured bird with ...

es.

References

Important Bird Areas of the Northern Territory Rivers of the Northern Territory Wetlands of the Northern Territory Arnhem Land Floodplains of Australia {{NorthernTerritory-river-stub