The islands are one of only four known breeding colonies of southern giant petrels around the coastline of continental Antarctica .
Antarctica is the only Antarctica   in nearly 3000 km of coastline between Davis Station ( Australia ) and Dumont d'Urville ( France ) .
The islands are one of only four known breeding colonies of southern giant petrels around the coastline of continental Antarctica , and it is the only breeding site in nearly 3000 km of coastline between Davis Station ( Australia ) and Dumont d'Urville ( France ) .