|Central coordinates||15o 23.00' West 10o 38.00' North|
|IBA criteria||A4i, A4ii|
|Altitude||0 - 12m|
|Year of IBA assessment||2001|
Site description Ile Alcatraz (0.75 ha) is a lateritic rock islet on the continental shelf of the Atlantic Ocean, 40 km south-west of Iles Tristao (IBA GN004). The Ile de Naufrage (0.25 ha) is a sandbank 2 km south-west of Ile Alcatraz which is exposed even at high tide. Ile Alcatraz is unvegetated and covered with guano to a depth of about 3 m, which is the cause of its white appearance. The Ile de Naufrage is also unvegetated and reaches a maximum height of c.3 m above high water. The intertidal area is mainly sandy.
|Species||Season||Period||Population estimate||Quality of estimate||IBA Criteria||IUCN Category|
|Brown Booby Sula leucogaster||breeding||1988||3,000 breeding pairs||-||A4ii||Least Concern|
|Royal Tern Thalasseus maximus||winter||1988||3,000 individuals||-||A4i||Least Concern|
|Protected area||Designation||Area (ha)||Relationship with IBA||Overlap with IBA (ha)|
|Ile Alcatraz||Wetlands of International Importance (Ramsar)||1||is identical to site||1|
|Land-use||Extent (% of site)|
|nature conservation and research||-|
Other biodiversity Among mammals, the dolphin Sousa teuszi (DD) and the sirenian Trichechus senegalensis (VU) are reported from the area; sea-turtles also occur.
References Altenburg and van der Kamp (1991a, b), Jones (1993).
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Recommended citation BirdLife International (2014) Important Bird Areas factsheet: Ile Alcatraz et Ile du Naufrage. Downloaded from http://www.birdlife.org on 31/07/2014
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