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Location Australia, Northern Territory
Central coordinates 134o 35.34' East  12o 7.57' South
IBA criteria A4i
Area 43,224 ha
Altitude 0 - 10m
Year of IBA assessment 2008

BirdLife Australia



Summary These floodplains have supported more than 1% of the world population of Pied Heron, Brolga and Great Knot. The large numbers of shorebirds recorded at Boucaut Bay include more than 1% of the world population of Great Knot and Pied Oystercatcher.

Site description The boundary follows the coastal floodplains of the Cadell and Blyth rivers, and the adjacent length of Boucaut Bay. This IBA is situated between the Maningrida community to the west and the Milingimbi community to the east. The seasonal flooding comes from flows down the Blyth and Cadell Rivers and various creeks. Most of the floodplain is more than 1 m deep in wetter years.

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
Pied Heron Egretta picata resident  1990-2000  1,000-4,895 individuals  medium  A4i  Least Concern 
Brolga Antigone rubicunda unknown  2000-2007  800-3,000 individuals  poor  A4i  Least Concern 
Pied Oystercatcher Haematopus longirostris unknown  1990-2001  311 individuals  poor  A4i  Least Concern 
Great Knot Calidris tenuirostris non-breeding  1990-2001  5,500 individuals  medium  A4i  Vulnerable 

Habitats

IUCN habitat Habitat detail Extent (% of site)
Forest Melaleuca forests & woodlands  major
Shrubland Chenopod shrubs, samphire shrubs and forblands  minor
Coastline Intertidal mud, sand & salt flats; Mangrove wetlands  major
Wetlands (inland) Riverine floodplains  major

Land ownership xxx

Land use

Land-use Extent (% of site)
other major
Notes: Traditional Use

Access/Land-Owner requests This IBA is on traditionally owned land.

References Chatto, R. (2000) Waterbird breeding colonies in the Top End of the Northern Territory. Technical Report 69, Parks and Wildlife Commission of the Northern Territory, Palmerston.

Chatto, R. (2003) The distribution and status of shorebirds around the coast and coastal wetlands of the Northern Territory. Technical Report 73, Parks and Wildlife Commission of the Northern Territory, Palmerston.

Chatto, R. (2006) The distribution and status of waterbirds around the coast and coastal wetlands of the Northern Territory. Technical Report 76, Parks and Wildlife Commission of the Northern Territory, Palmerston.

DEWHA (2008) Directory of Important Wetlands in Australia (NT022) http://www.environment.gov.au/water/publications/environmental/wetlands/database/ accessed 2008.

Harrison, L., McGuire, L., Ward, S. Fisher, A., Pavey, C., Fegan, M. and Lynch, B. (2009) An inventory of sites of international and national significance for biodiversity values in the Northern Territory. Department of Natural Resources, Environment, the Arts & Sport, Darwin, NT.

Ward, S. and Harrison, L. (2009) Recognising sites of conservation significance for biodiversity values in the Northern Territory. Department of Natural Resources, Environment, the Arts & Sport, Darwin, NT.

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Recommended citation  BirdLife International (2014) Important Bird Areas factsheet: Cadell and Blyth Floodplains. Downloaded from http://www.birdlife.org on 19/09/2014

To provide new information to update this factsheet or to correct any errors, please email BirdLife