The Rallier du Baty Peninsula (french: Péninsule Rallier du Baty or ''Presqu'ile Rallier du Baty'') is a

peninsula A peninsula (; ) is a landform that extends from a mainland and is surrounded by water on most, but not all of its borders. A peninsula is also sometimes defined as a piece of land bordered by water on three of its sides. Peninsulas exist on a ...

of Grande Terre, the main island of the

subantarctic The sub-Antarctic zone is a region in the Southern Hemisphere, located immediately north of the Antarctic region. This translates roughly to a latitude of between 46° and 60° south of the Equator. The subantarctic region includes many islands ...

Kerguelen The Kerguelen Islands ( or ; in French commonly ' but officially ', ), also known as the Desolation Islands (' in French), are a group of islands in the sub-Antarctic constituting one of the two exposed parts of the Kerguelen Plateau, a large ...

archipelago An archipelago ( ), sometimes called an island group or island chain, is a chain, cluster, or collection of islands, or sometimes a sea containing a small number of scattered islands. Examples of archipelagos include: the Indonesian Arch ...

in the southern

Indian Ocean The Indian Ocean is the third-largest of the world's five oceanic divisions, covering or ~19.8% of the water on Earth's surface. It is bounded by Asia to the north, Africa to the west and Australia to the east. To the south it is bounded by ...

. It occupies the south-western corner of the island, and is about 35 km long, extending from north to south, and 25 km across at its widest. The 1,202 m high

Bicorne The bicorne or bicorn (two-cornered) is a historical form of hat widely adopted in the 1790s as an item of uniform by European and American army and naval officers. Most generals and staff officers of the Napoleonic period wore bicornes, whic ...

rises in the southern coast of the peninsula. It is named for

Raymond Rallier du Baty Raymond Rallier du Baty (30 August 1881 – 7 May 1978) was a French sailor and explorer, from Lorient in Brittany, who carried out surveys of the subantarctic Kerguelen Islands in the southern Indian Ocean in the early 20th century. Rallier du ...

, a French sailor who charted the archipelago in the early 20th century. The Îles Boynes, France's southernmost land apart from

Adélie Land Adélie Land (french: Terre Adélie, ) is a claimed territory on the continent of Antarctica. It stretches from a portion of the Southern Ocean coastline all the way inland to the South Pole. France has administered it as one of five districts ...

in Antarctica, lie 30 km south of the tip of the peninsula.

Important Bird Area

The western half of the peninsula has been identified by

BirdLife International BirdLife International is a global partnership of non-governmental organizations that strives to conserve birds and their habitats. BirdLife International's priorities include preventing extinction of bird species, identifying and safeguarding ...

as a 270 km²

Important Bird Area An Important Bird and Biodiversity Area (IBA) is an area identified using an internationally agreed set of criteria as being globally important for the conservation of bird populations. IBA was developed and sites are identified by BirdLife Inte ...

(IBA) because of its value as a breeding site for

seabird Seabirds (also known as marine birds) are birds that are adapted to life within the marine environment. While seabirds vary greatly in lifestyle, behaviour and physiology, they often exhibit striking convergent evolution, as the same envir ...

s, with at least 31 species nesting there. The site is bordered on the north by the

Cook Glacier The Cook Ice Cap or Cook Glacier ( or ''Glacier Cook'') is a large ice cap in the Kerguelen Islands in the French Southern Territories zone of the far Southern Indian Ocean. Geography The Cook Ice Cap reaches a maximum elevation of in its cent ...

and, to the south and east, by the Arête Jérémine and the main mountain ridge of the peninsula. Because it is isolated by rivers and glaciers, it is the only part of Grande Terre free from

cat The cat (''Felis catus'') is a domestic species of small carnivorous mammal. It is the only domesticated species in the family Felidae and is commonly referred to as the domestic cat or house cat to distinguish it from the wild members of ...

s and rats, while

rabbit Rabbits, also known as bunnies or bunny rabbits, are small mammals in the family Leporidae (which also contains the hares) of the order Lagomorpha (which also contains the pikas). ''Oryctolagus cuniculus'' includes the European rabbit sp ...

s are largely restricted to the northern part. The landscape is hilly and mostly lacks vegetation. The area shows geothermal activity, with vents emitting steam and gas. The

ice cap In glaciology, an ice cap is a mass of ice that covers less than of land area (usually covering a highland area). Larger ice masses covering more than are termed ice sheets. Description Ice caps are not constrained by topographical feat ...

ped mountains are cut by large, glaciated valleys. Human visitation is rare. The IBA is particularly important for

penguin Penguins (order Sphenisciformes , family Spheniscidae ) are a group of aquatic flightless birds. They live almost exclusively in the Southern Hemisphere: only one species, the Galápagos penguin, is found north of the Equator. Highly adap ...

s, with 10,000 pairs of eastern rockhoppers, up to 3000 pairs of gentoos, 60,000 pairs of

kings Kings or King's may refer to: *Monarchs: The sovereign heads of states and/or nations, with the male being kings *One of several works known as the "Book of Kings": **The Books of Kings part of the Bible, divided into two parts **The ''Shahnameh'' ...

and over half a million pairs of macaronis. The colony of 750 pairs of

wandering albatross The wandering albatross, snowy albatross, white-winged albatross or goonie (''Diomedea exulans'') is a large seabird from the family Diomedeidae, which has a circumpolar range in the Southern Ocean. It was the last species of albatross to be desc ...

es is the largest in Kerguelen. It is the only known breeding site in the archipelago for

southern giant petrel The southern giant petrel (''Macronectes giganteus''), also known as the Antarctic giant petrel, giant fulmar, stinker, and stinkpot, is a large seabird of the southern oceans. Its distribution overlaps broadly with the similar northern giant pet ...

s. It also holds very large populations of smaller petrels, especially

white-headed petrel The white-headed petrel (''Pterodroma lessonii''), also known as the white-headed fulmar, is a species of seabird in the petrel family, Procellariidae. It is about in length. White-headed petrels breed alone or in colonies in burrows dug among ...

s, slender-billed and

Antarctic prion The Antarctic prion (''Pachyptila desolata'') also known as the dove prion, or totorore in Māori, is the largest of the prions, a genus of small petrels of the Southern Ocean. Taxonomy The Antarctic prion was formally described in 1789 by ...

s, and

South Georgia South Georgia ( es, Isla San Pedro) is an island in the South Atlantic Ocean that is part of the British Overseas Territory of South Georgia and the South Sandwich Islands. It lies around east of the Falkland Islands. Stretching in the east� ...

and

common diving petrel The common diving petrel (''Pelecanoides urinatrix''), also known as the smaller diving petrel or simply the diving petrel, is a diving petrel, one of four very similar auk-like small petrels of the southern oceans. It is native to South Atlant ...

s. Other birds breeding in the IBA include

Eaton's pintail Eaton's pintail (''Anas eatoni'') is a dabbling duck of the genus ''Anas''. It is also known as the southern pintail. The species is restricted to the island groups of Kerguelen and Crozet in the southern Indian Ocean. It resembles a small f ...

s, Kerguelen shags,

black-faced sheathbill The black-faced sheathbill (''Chionis minor''), also known as the lesser sheathbill or paddy bird, is one of only two species of sheathbills, aberrant shorebirds which are terrestrial scavengers of subantarctic islands. Description They are ...

s and

Kerguelen tern The Kerguelen tern (''Sterna virgata'') is a tern of the southern hemisphere. This seabird mainly breeds colonially in the Kerguelen Islands, as its common name implies. However, smaller colonies are also found in the Prince Edward Islands (i. ...

s.BirdLife International. (2012). Important Bird Areas factsheet: Péninsule Rallier du Baty. Downloaded from http://www.birdlife.org on 2012-01-11.

Vegetation

The western half of the Péninsule Rallier du Baty has the endemic but rare Lyallia Cushion.

Area management

Western Péninsule Rallier du Baty remains an area with limited access. Owing to its status as an 'Area restricted to scientific and technical research', visitors to the site are mostly scientists or researchers. The area could also be turned into a nature reserve in the future. Colonization of the site by mammalian species such as rats has gone up in the recent years as the natural barrier that were the glaciers have been shrinking.

References

{{DEFAULTSORT:Peninsule Rallier Du Baty Landforms of the Kerguelen Islands Important Bird Areas of Kerguelen Rallier du Baty Peninsulas of France