Falkland Islands British military garrison is stationed on the islands, and the Falkland Islands government funds an additional company-sized light infantry Falkland Islands Defence Force. The Falklands claim an exclusive economic zone (EEZ) extending from its coastal baselines, based on the United Nations Convention on the Law of the Sea; this zone overlaps with the EEZ of Argentina. The United Kingdom and Argentina both claim the Falkland Islands. The UK bases its position on its continuous administration of the islands since 1833 and the islanders' "right to self-determination as set out in the UN Charter". Argentina's position is that it acquired the
Bird Island, Falkland Islands any offshore island around the Falklands, possibly due to the very large population of thin-billed prions, an important prey species. Deep Tussac cover over most of Bird Island makes it comparable to Beauchene Island for the density of burrowing petrels. Other species that should be investigated include sooty shearwater, grey-backed storm petrel, which is thought to be numerous, rock shag, imperial shag and dolphin gull. Endemic races present include the dark-faced ground-tyrant, Falkland thrush, long-tailed meadowlark and common diving petrel. Bird Island, Falkland Islands Bird Island () is one of the Falkland Islands. It lies due south of West Falkland,