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The site was identified as important in 2007 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
Micronesian Scrubfowl Megapodius laperouse	NT	resident	-	present	A1, A2
White-throated Ground Dove Pampusana xanthonura	NT	resident	-	present	A1, A2
Micronesian Myzomela Myzomela rubratra	LC	resident	-	present	A2
Micronesian Starling Aplonis opaca	LC	resident	-	present	A2

1. The current IUCN Red List category. The category at the time of the IBA criteria assessment (2007) may differ.

Ideally the conservation status of the IBA will have been checked regularly since the site was first identified in 2007. The most recent assessment (2007) is shown below.

Pressure (threats to the trigger species and/or their habitats)
Threat	Timing	Scope	Severity	Result
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
-	Asuncion Island	Preserve	9
1985	Asuncion Island	Preserve	74
2009	Marianas Trench	Marine National Monument	100
2009	Marianas Trench	Marine National Monument	100

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Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Asuncion Island (Northern Mariana Islands (to USA)). Downloaded from https://datazone.birdlife.org/site/factsheet/asuncion-island-iba-northern-mariana-islands-(to-usa) on 23/11/2024.