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Location High Seas
Central coordinates 32o 48.00' West  49o 24.00' South
IBA criteria A1, A4ii, A4iii
Area 371,695 ha
Year of IBA assessment 2012

Site description This Marine IBA is identified using tracking data. It falls within High Seas International Waters and the Atlantic, Southwest FAO ocean region. The site covers an area of 3717 km2 and is 499 km away from the closet coastline. The depth ranges from 5003 to 5606 m, mean annual sea surface temperature falls between 3.85 and 5.11 °C and mean annual chlorophyll-a concentrations found to range between 0.36 and 0.46 mg/m3.

Key Biodiversity 2 species trigger IBA criteria at this Marine IBA. BirdLife analyses of tracking data estimates that 31205-62410 individuals of Grey-headed Albatross (VU) from South Georgia are present at the site during the Non-breeding (Oct-Jun) life-history stage. 13931-13931 individuals of Black-browed Albatross (EN) from South Georgia are present at the site during the Incubation (Sep-Dec) life-history stage.

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
Grey-headed Albatross Thalassarche chrysostoma non-breeding  1999  31,205-62,410 individuals  A1, A4ii  Endangered 
Black-browed Albatross Thalassarche melanophris incubation  1996  13,931 individuals  A1  Near Threatened 
A4iii Species group - seabirds non-breeding  31,205-62,410 individuals  A4iii   


IUCN habitat Habitat detail Extent (% of site)
Sea   100%

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Recommended citation  BirdLife International (2016) Important Bird and Biodiversity Area factsheet: Atlantic, Southwest 37 - Marine. Downloaded from on 24/10/2016

To provide new information to update this factsheet or to correct any errors, please email BirdLife