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The site was identified as important in 2009 because it was regularly supporting significant populations of the species listed below, meeting ('triggering') IBA criteria.

Populations meeting IBA criteria ('trigger species') at the site:

Species	Red List1	Season	Year(s)	Size	IBA criteria
Chestnut-quilled Rock-pigeon Petrophassa rufipennis	LC	resident	1987-2008	common	A2, A3
Bush Thick-knee Burhinus grallarius	LC	resident	1998-2008	frequent	A1
Northern Rosella Platycercus venustus	LC	resident	1987-2008	frequent	A3
Varied Lorikeet Psitteuteles versicolor	LC	resident	1987-2008	frequent	A3
Rainbow Pitta Pitta iris	LC	resident	1987-2008	common	A2, A3
White-throated Grasswren Amytornis woodwardi	EN	resident	1987-1988	5,000-50,000 individuals	A1, A2, A3
Banded Honeyeater Cissomela pectoralis	LC	resident	1987-2008	common	A3
Silver-crowned Friarbird Philemon argenticeps	LC	resident	1987-2008	abundant	A3
Bar-breasted Honeyeater Ramsayornis fasciatus	LC	resident	1998-2008	uncommon	A3
White-lined Honeyeater Microptilotis albilineatus	LC	resident	1998-2008	common	A2, A3
White-gaped Honeyeater Stomiopera unicolor	LC	resident	1987-2008	abundant	A3
Yellow-tinted Honeyeater Ptilotula flavescens	LC	resident	1998-2008	uncommon	A3
Sandstone Shrike-thrush Colluricincla woodwardi	LC	resident	1987-2008	frequent	A3
Masked Finch Poephila personata	LC	resident	1998-2008	uncommon	A3
Long-tailed Finch Poephila acuticauda	LC	resident	1998-2008	uncommon	A3

1. The current IUCN Red List category. The category at the time of the IBA criteria assessment (2009) may differ.

Ideally the conservation status of the IBA will have been checked regularly since the site was first identified in 2009. The most recent assessment (2008) is shown below.

Pressure (threats to the trigger species and/or their habitats)
Threat	Timing	Scope	Severity	Result
Natural system modifications	happening now	majority/most of area/population (50-90%)	moderate to rapid deterioration	high
Invasive and other problematic species and genes	happening now	majority/most of area/population (50-90%)	slow but significant deterioration	high

Response (conservation actions taken for the trigger species and/or their habitats)
Protected areas	Management plan	Other action	Result
Not assessed	Not assessed	Not assessed	not assessed

Year	Protected Area	Designation	% overlap with IBA
1979	Kakadu	National Park (Commonwealth)	27
1980	Kakadu National Park	Ramsar Site, Wetland of International Importance	27
1981	Kakadu National Park	World Heritage Site (natural or mixed)	27
1991	Kakadu	National Park	27
1998	Nitmiluk	National Park	3
2009	Warddeken	Indigenous Protected Area	48

Habitat1	Habitat detail	% of IBA
Rocky areas (eg. inland cliffs, mountain peaks)	Scree & boulders	major (>10)
Forest	Rainforest & vine thickets	minor (<10)
Grassland	Hummock grasslands	minor (<10)
Savanna	Tropical eucalypt woodlands & grasslands	minor (<10)
Shrubland	Heath	minor (<10)

1. IUCN Habitat classification.

Land use	% of IBA
nature conservation and research	major (>10)
other	major (>10)
hunting	minor (<10)

Arnhem Land and Manyallalik ALT; Kakadu managed by Commonwealth government.

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Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Arnhem Plateau (Australia). Downloaded from https://datazone.birdlife.org/site/factsheet/arnhem-plateau-iba-australia on 22/11/2024.