This Marine IBA is identified using seaward extensions around breeding colonies. It originates from the Mauritius Exclusive Economic Zone (EEZ) and falls within the Indian Ocean, Western FAO ocean region. The site covers an area of 10436 km2 and is 22 km away from the closet coastline. The depth ranges from 0 to 4380 m, with a mean annual wind speed of 2.12 m/s and mean annual sea surface temperature falls between 25.37 and 25.77 °C.
7 species trigger IBA criteria at this Marine IBA. Seaward extensions around breeding colonies; Serpent Island, Round Island include key near-colony areas for breeding populations of Brown Noddy (LC) 15000-10800 individuals, Lesser Noddy (LC) 15000-240000 individuals, Sooty Tern (LC) 300000-1200000 individuals, White-tailed Tropicbird (LC) 1500-3000 individuals, Red-tailed Tropicbird (LC) 1500-2100 individuals, Trindade Petrel (Round Island Petrel) (VU) 1200-1200 individuals and Wedge-tailed Shearwater (LC) 150000-150000 individuals.
BirdLife International (2021) Important Bird Areas factsheet: Round Island / Serpent Island - Marine. Downloaded from http://www.birdlife.org on 18/01/2021.