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The site was identified as important in 2006 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
Masked Booby Sula dactylatra	LC	breeding	1991-2004	5,100 individuals	A4ii
Brown Noddy Anous stolidus	LC	breeding	1998-2004	18,700 individuals	A4i
Black Noddy Anous minutus	LC	breeding	2004	1,750 individuals	A4i
Sooty Tern Onychoprion fuscatus	LC	breeding	-	140,000 individuals	A4i
A4iii Species group - waterbirds	n/a	breeding	-	100,000-499,999 individuals	A4iii

1. The current IUCN Red List category. The category at the time of the IBA criteria assessment (2006) may differ.

Ideally the conservation status of the IBA will have been checked regularly since the site was first identified in 2006. The most recent assessment (2024) is shown below.

State (condition of the trigger species' habitats)
Habitat	Quantity (% remaining)	Quality (% carrying capacity)	Result
Grassland	good (> 90%)	good (> 90%)	favourable
Rocky areas (eg. inland cliffs, mountain peaks)	good (> 90%)	good (> 90%)	favourable

Pressure (threats to the trigger species and/or their habitats)
Threat	Timing	Scope	Severity	Result
Climate change and severe weather	likely in long term (beyond 4 years)	whole area/population (>90%)	very rapid to severe deterioration	high
Biological resource use	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	Reserva Biológica Atol Das Rocas	Reserva Biológica	100
2001	Brazilian Atlantic Islands: Fernando de Noronha and Atol das Rocas Reserves	World Heritage Site (natural or mixed)	8
2015	Atol das Rocas Biological Reserve	Ramsar Site, Wetland of International Importance	100

Habitat1	Habitat detail	% of IBA
Grassland		major (>10)
Rocky areas (eg. inland cliffs, mountain peaks)		major (>10)

1. IUCN Habitat classification.

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Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Atol das Rocas (Brazil). Downloaded from https://datazone.birdlife.org/site/factsheet/atol-das-rocas-iba-brazil on 23/11/2024.