Alligator Rivers Floodplains


IBA Criteria

Year of most recent IBA criteria assessment: 2009

Populations of IBA trigger species
Species Current IUCN Red List Category Season Year(s) of estimate Population estimate IBA Criteria Triggered
Magpie Goose Anseranas semipalmata LC unknown 1981-1994 1,600,000 individuals A4i
Plumed Whistling-duck Dendrocygna eytoni LC unknown 1981-1994 50,000 individuals A4i
Wandering Whistling-duck Dendrocygna arcuata LC unknown 1981-1994 400,000 individuals A4i
Radjah Shelduck Radjah radjah LC unknown 1981-1994 20,000 individuals A4i
Green Pygmy-goose Nettapus pulchellus LC unknown 1981-1994 50,000 individuals A4i
Pacific Black Duck Anas superciliosa LC unknown 1981-1994 60,000 individuals A4i
Grey Teal Anas gracilis LC unknown 1981-1994 50,000 individuals A4i
Brolga Antigone rubicunda LC unknown 1981-1994 24,000 individuals A4i
Australian Bustard Ardeotis australis LC unknown 1998-2008 212 individuals A1
Black-necked Stork Ephippiorhynchus asiaticus NT unknown 1981-1984 1,800 individuals A1, A4i
Royal Spoonbill Platalea regia LC unknown 1981-1994 35,000 individuals A4i
Australian Ibis Threskiornis moluccus LC unknown 1981-1994 15,000 individuals A4i
Straw-necked Ibis Threskiornis spinicollis LC unknown 1981-1994 80,000 individuals A4i
Glossy Ibis Plegadis falcinellus LC unknown 1981-1994 60,000 individuals A4i
Pied Heron Egretta picata LC unknown 1981-1994 50,000 individuals A4i
Mesophoyx intermedia NR unknown 1981-1994 200,000 individuals A4i
Australian Pelican Pelecanus conspicillatus LC unknown 1981-1994 50,000 individuals A4i
Bush Thick-knee Burhinus grallarius LC resident 1998-2008 frequent A1
Himantopus leucocephalus NR unknown 1981-1994 100,000 individuals A4i
Vanellus miles NR unknown 1981-1994 80,000 individuals A4i
Comb-crested Jacana Irediparra gallinacea LC unknown 1981-1994 25,000 individuals A4i
Little Curlew Numenius minutus LC non-breeding 1981-1994 300,000 individuals A4i
Sharp-tailed Sandpiper Calidris acuminata LC non-breeding 1990-2002 4,900 individuals A4i
Australian Pratincole Stiltia isabella LC unknown 1981-1994 30,000 individuals A4i
Whiskered Tern Chlidonias hybrida LC non-breeding 1981-1994 45,000 individuals A4i
Northern Rosella Platycercus venustus LC resident 1998-2008 uncommon A3
Varied Lorikeet Psitteuteles versicolor LC unknown 1998-2008 uncommon A3
Rainbow Pitta Pitta iris LC resident 1998-2008 uncommon A2, A3
Banded Honeyeater Cissomela pectoralis LC resident 1998-2008 uncommon A3
Silver-crowned Friarbird Philemon argenticeps LC resident 1998-2008 uncommon A3
Bar-breasted Honeyeater Ramsayornis fasciatus LC resident 1998-2008 uncommon A3
White-gaped Honeyeater Stomiopera unicolor LC resident 1998-2008 abundant A3
Poecilodryas superciliosa NR resident 1998-2008 uncommon A3
Australian Yellow White-eye Zosterops luteus LC resident 1998-2008 uncommon A3
Masked Finch Poephila personata LC resident 1998-2008 uncommon A3
Long-tailed Finch Poephila acuticauda LC resident 1998-2008 frequent A3

Note: This table presents the IBA criteria triggered and the species that triggered then at the time of assessment, the current IUCN Red List category may vary from that which was in place at that time.

For more information about the IBA assessment process and criteria please click here


IBA Monitoring

Most recent IBA monitoring assessment
Year of assessment Threat score (pressure) Condition score (state) Action score (response)
2008 high not assessed not assessed
Was the whole site covered? Yes State assessed by unset
Accuracy of information good

Threats to the site (pressure)
Threat Level 1 Threat Level 2 Timing Scope Severity Result
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
Energy production and mining mining and quarrying happening now small area/few individuals (<10%) slow but significant deterioration low
Invasive and other problematic species and genes invasive non-native/alien species/diseases - named species happening now majority/most of area/population (50-90%) slow but significant deterioration high

Conservation actions taken at site (response)
Conservation Designation Management Planning Conservation Action Result
Not assessed Not assessed Not assessed not assessed
For more information about IBA monitoring please click here

IBA Protection

Protection status:

Protected Area Designation Area (ha) Relationship with IBA Overlap with IBA (ha)
Kakadu National Park 1,980,400 protected area overlaps with site 248,294

Habitats

IUCN Habitat Habitat detail Extent (% of site)
Forest Melaleuca forests & woodlands -
Shrubland Chenopod shrubs, samphire shrubs and forblands -
Coastline Intertidal mud, sand & salt flats, Mangrove wetlands -
Wetlands (inland) Riverine floodplains -
For further information about the habitat classification please click here.

Land use

Land-use Extent (% of site)
other -
nature conservation and research -
For further information about the land use classification please click here.

Land ownership
Kakadu NP owned by Traditional Owners and managed in partnership with National Parks; wetlands to east owned by Arnhemland ALT.


Recommended citation
BirdLife International (2020) Important Bird Areas factsheet: Alligator Rivers Floodplains. Downloaded from http://www.birdlife.org on 22/01/2020.