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The site was identified as important in 2012 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
Wedge-tailed Shearwater Ardenna pacifica	LC	breeding	1990	20,000-50,000 individuals	A4ii
Red-footed Booby Sula sula	LC	breeding	1990	10,000 individuals	A4ii
Brown Booby Sula leucogaster	LC	breeding	1990	1,000-10,000 individuals	A4ii

1. The current IUCN Red List category. The category at the time of the IBA criteria assessment (2012) may differ.

Ideally the conservation status of the IBA will have been checked regularly since the site was first identified in 2012. The most recent assessment (2012) is shown below.

State (condition of the trigger species' habitats)
Habitat	Quantity (% remaining)	Quality (% carrying capacity)	Result
Marine Neritic	good (> 90%)	good (> 90%)	favourable

Pressure (threats to the trigger species and/or their habitats)
Threat	Timing	Scope	Severity	Result
Pollution	happening now	some of area/population (10-49%)	no or imperceptible deterioration	low
Climate change and severe weather	likely in long term (beyond 4 years)	whole area/population (>90%)	no or imperceptible deterioration	low

Response (conservation actions taken for the trigger species and/or their habitats)
Protected areas	Management plan	Other action	Result
Little/none of site covered (<10%)	No management planning has taken place	Very little or no conservation action taking place	negligible

Habitat1	Habitat detail	% of IBA
Marine Neritic		100

1. IUCN Habitat classification.

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Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Ata Island Marine (Tonga). Downloaded from https://datazone.birdlife.org/site/factsheet/ata-island-marine-iba-tonga on 23/11/2024.