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Year of most recent IBA criteria assessment: 2008

Populations of IBA trigger species

Species	Current IUCN Red List Category	Season	Year(s) of estimate	Population estimate	IBA Criteria Triggered
Micronesian Scrubfowl Megapodius laperouse	NT	resident	2005	present	A1, A2
Palau Ground-dove Pampusana canifrons	EN	resident	2005	present	A2
Micronesian Imperial-pigeon Ducula oceanica	VU	resident	2005	present	A2
Palau Fruit-dove Ptilinopus pelewensis	LC	resident	2005	present	A2
Palau Swiftlet Aerodramus pelewensis	LC	resident	2005	present	A2
Palau Kingfisher Todiramphus pelewensis	NT	resident	2005	present	A2
Micronesian Myzomela Myzomela rubratra	LC	resident	2005	present	A2
Morningbird Pachycephala tenebrosa	LC	resident	2005	present	A2
Palau Fantail Rhipidura lepida	LC	resident	2005	present	A2
Palau Flycatcher Myiagra erythrops	LC	resident	2005	present	A2
Palau Bush-warbler Horornis annae	LC	resident	2005	present	A2
Giant White-eye Megazosterops palauensis	NT	resident	2005	present	A2
Dusky White-eye Zosterops finschii	LC	resident	2005	present	A2
Citrine White-eye Zosterops semperi	LC	resident	2005	present	A2
Micronesian Starling Aplonis opaca	LC	resident	2005	present	A2

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

Threats to the site (pressure)
Threat Level 1	Threat Level 2	Timing	Scope	Severity	Result
Biological resource use	gathering terrestrial plants - intentional use (species being assessed is the target)	happening now	some of area/population (10-49%)	moderate to rapid deterioration	high
Human intrusions and disturbance	recreational activities	happening now	some of area/population (10-49%)	no or imperceptible deterioration	low
Invasive and other problematic species and genes	invasive non-native/alien species/diseases - named species	happening now	some of area/population (10-49%)	slow but significant deterioration	medium

Condition of habitat (state)
Habitat	Habitat Detail	Reference Area (ha)	Actual Area (ha)	% of habitat remaining	% of carrying capacity (overall)	Result
Forest		358	357	-	good (> 90%)	favourable

Conservation actions taken at site (response)
Conservation Designation	Management Planning	Conservation Action	Result
Whole area of site (>90%) covered by appropriate conservation designation	A comprehensive and appropriate management plan exists that aims to maintain or improve the populations of qualifying bird species	Substantive conservation measures are being implemented but these are not comprehensive and are limited by resources and capacity	high

For more information about IBA monitoring please click here

Protected Area	Designation	Area (ha)	Relationship with IBA	Overlap with IBA (ha)
Rock Islands Southern Lagoon	World Heritage Site (natural or mixed)	100,200	protected area overlaps with site	4,912
Rock Islands Southern Lagoon	Conservation Area	84,060	protected area contains site	4,912
Ngkisaol Sardines	Sanctuary	113	protected area contained by site	0
Ngerumekoal	Spawning Area	352	protected area overlaps with site	0
Ngerukewid Islands	Wildlife Preserve	1,140	protected area contained by site	0

IUCN Habitat	Habitat detail	Extent (% of site)
Forest	Lowland evergreen rain forest (tropical), Beach and atoll forest	-

For further information about the habitat classification please click here.

Land-use	Extent (% of site)
nature conservation and research	-
tourism/recreation	-

For further information about the land use classification please click here.

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Recommended citation
BirdLife International (2023) Important Bird Areas factsheet: Rock Islands. Downloaded from http://www.birdlife.org on 28/01/2023.