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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
Partridge Pigeon Geophaps smithii	LC	resident	2001-2002	1,000-2,500 individuals	A1, A2, A3
Chestnut Rail Eulabeornis castaneoventris	LC	resident	2000	uncommon	A2
Bush Thick-knee Burhinus grallarius	LC	resident	1998-2008	frequent	A1
Beach Thick-knee Esacus magnirostris	NT	resident	-	26 breeding pairs	A1
Great Knot Calidris tenuirostris	EN	non-breeding	1990-2002	12,000 individuals	A4i
Red Goshawk Erythrotriorchis radiatus	EN	resident	2006	80-160 individuals	A1
Northern Rosella Platycercus venustus	LC	resident	1998-2008	common	A3
Varied Lorikeet Psitteuteles versicolor	LC	resident	1998-2008	common	A3
Rainbow Pitta Pitta iris	LC	resident	1998-2008	uncommon	A2, A3
Silver-crowned Friarbird Philemon argenticeps	LC	resident	1998-2008	abundant	A3
Bar-breasted Honeyeater Ramsayornis fasciatus	LC	resident	1998-2008	frequent	A3
White-gaped Honeyeater Stomiopera unicolor	LC	resident	1998-2008	frequent	A3
Yellow-tinted Honeyeater Ptilotula flavescens	LC	resident	1998-2008	common	A3
Australian Yellow White-eye Zosterops luteus	LC	resident	1998-2008	common	A3
Masked Finch Poephila personata	LC	resident	1998-2008	rare	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 (2019) is shown below.

Pressure (threats to the trigger species and/or their habitats)
Threat	Timing	Scope	Severity	Result
Agricultural expansion and intensification	happening now	some of area/population (10-49%)	moderate to rapid deterioration	high
Natural system modifications	happening now	majority/most of area/population (50-90%)	slow but significant deterioration	high
Invasive and other problematic species and genes	happening now	some of area/population (10-49%)	slow but significant deterioration	medium

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
1991	Kakadu	National Park	100

Habitat1	Habitat detail	% of IBA
Grassland	Tussock grasslands	2
Wetlands (inland)	Ephemeral	2
Forest	Eucalypt woodlands, Eucalypt open forests, Eucalypt tall open forests, Melaleuca forests & woodlands, Rainforest & vine thickets, Mangroves	major (>10)
Marine Intertidal		major (>10)
Artificial/Terrestrial	Forestry plantations, Urban parks & gardens	minor (<10)

1. IUCN Habitat classification.

Land use	% of IBA
other	major (>10)
forestry	minor (<10)

Tiwi ALT.

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Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Tiwi Islands (Australia). Downloaded from https://datazone.birdlife.org/site/factsheet/tiwi-islands-iba-australia on 22/11/2024.