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Location Australia, Northern Territory
Central coordinates 134o 54.07' East  12o 3.73' South
IBA criteria A4i
Area 9,375 ha
Altitude 0 - 10m
Year of IBA assessment 2009

BirdLife Australia



Summary These mudflats support more than 1% of the world population of Grey-tailed Tattler and Pied Oystercatcher, and large numbers of other shorebirds.

Site description This IBA includes the small inshore islands of Darbada, Crocodile, Yabooma, Gananggarngur and Mooroongga, and the coastal fringe of Milingimbi Island. The shorebirds are likely to use other adjacent mudflats including the remainder of Castlereagh Bay but there is insufficient data to map feeding areas off these islands. The adjacent floodplains of the Glyde River have large numbers of waterbirds but the limited data do not qualify this area for IBA status. The IBA is mostly intertidal mudflats with fringing mangroves and samphire (chenopod) shrubland, with some sandy beaches and dunes on some exposed shores.

Key Biodiversity The islands also support large numbers of other waterbirds including counts of 1000 Radjah Shelduck, 800 Terek Sandpiper, 5650 Bar-tailed Godwit and 3000 Common Tern (Chatto 2003, 2006). A waterbird nesting colony on an island north of Milingimbi had about 2000 egrets in 1999 (Chatto (2000a) waterbird breeding colony ref W064). Chestnut Rails have been recorded on the islands but their local abundance is poorly known (Chatto 2006).

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
Pied Oystercatcher Haematopus longirostris resident  1990-2002  155-320 individuals  medium  A4i  Least Concern 
Grey-tailed Tattler Tringa brevipes non-breeding  1990-2002  800 individuals  medium  A4i  Near Threatened 
Far Eastern Curlew Numenius madagascariensis non-breeding  1990-2002  700 individuals  poor  A4i  Vulnerable 
Great Knot Calidris tenuirostris non-breeding  1990-2002  4,400 individuals  poor  A4i  Vulnerable 

IBA Monitoring

2008 medium not assessed not assessed
unset
Poor - based on little, or potentially unreliable/unrepresentative, data

Climate change and severe weather storms and floods likely in long term (beyond 4 years) some of area/population (10-49%) slow but significant deterioration medium

Habitats

IUCN habitat Habitat detail Extent (% of site)
Coastline Intertidal mud, sand & salt flats; Mangrove wetlands; Salt marshes  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. (2000a) 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. (2000b) A management strategy and protected areas system for coastal wildlife. (Documentation of selected sites in the Northern Territory of Australia which would qualify for nomination under the East Asian - Australasian Shorebird Site Network). Unpublished report, 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.

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: Milingimbi Islands. Downloaded from http://www.birdlife.org on 25/12/2014

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