This Marine IBA is identified using both tracking data and seaward extensions around breeding colonies. It falls within the South Georgia and the South Sandwich Islands Exclusive Economic Zone (EEZ) and the Atlantic, Antarctic FAO ocean region. The site covers an area of 12313 km2 and is 397 km away from the closet coastline. The depth ranges from 0 to 2577 m, with a mean annual wind speed of 3.01 m/s, mean annual sea surface temperature falls between 1.43 and 2.07 °C and mean annual chlorophyll-a concentrations found to range between 0.38 and 0.8 mg/m3.
8 species trigger IBA criteria at this Marine IBA. BirdLife analyses of tracking data estimates that 383-3519 individuals of Wandering Albatross (VU) from South Georgia are present at the site during the Brood-guard (Mar-Apr), Incubation (Dec-Mar) and Post-guard (Apr-Dec) life-history stages. 177-820 individuals of White-chinned Petrel (VU) from South Georgia are present at the site during the Post-guard (Jan-May) life-history stage. 13373-101892 individuals of Black-browed Albatross (EN) from South Georgia are present at the site during the Brood-guard (Dec-Jan), Incubation (Sep-Dec) and Post-guard (Jan-May) life-history stages. Seaward extensions around breeding colony; South Georgia - mainland, islands, islets and stacks include key near-colony areas for breeding populations of Imperial Shag (LC) 15483-20128 breeding pairs.
BirdLife International (2021) Important Bird Areas factsheet: Shag Rocks - Marine. Downloaded from http://www.birdlife.org on 25/01/2021.