email a friend
printable version
Location French Southern Territories, Îles Kerguelen
Central coordinates 68o 50.00' East  49o 35.00' South
IBA criteria A1, A2, A4ii
Area 27,000 ha
Altitude 0 - 1,262m
Year of IBA assessment 2001

Site description This site covers the western half of Péninsule Rallier du Baty in south-western Grande Terre. It is bordered to the north by the Cook Glacier and, to the east and south, by the main mountain ridge of the peninsula and the Arête Jérémine, respectively. Protected by rivers and glaciers, it is the only part of Grande Terre free from rats and cats, while rabbits are restricted to the northern part of the site. The landscape is mostly devoid of vegetation and the relief is very hilly, with glaciers covering mountain peaks. The mountains are interrupted by large, westward-sloping, glaciated valleys. The area is geothermically active, indicated by vents of steam and gas. Human visits to the site are only very occasional.

Key Biodiversity See Box for key species. This site holds very high densities of seabirds and at least 31 species breed. Penguins are particularly common as, in addition to those listed below, 10,000 pairs of E. chrysocome breed. The colony of Diomedea exulans is the largest in Kerguelen. It is also the only known breeding site in the archipelago for Macronectes giganteus, of which a few pairs occur. The site holds very large populations of petrels, particularly Pachyptila belcheri as well as a small population of Phalacrocorax verrucosus. It is possible that numbers of breeding Pterodroma lessoni, Pachyptila desolata, P. belcheri, Pelecanoides georgicus, P. urinatrix Anas eatoni, Chionis minor and Sterna virgata exceed thresholds, but quantitative data are lacking.

Non-bird biodiversity: The site is one of the few places where the endemic plant Lyallia kerguelensis is still known to occur.

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
Southern Pintail Anas eatoni resident  1989  present  A2  Vulnerable 
Macaroni Penguin Eudyptes chrysolophus breeding  1989  500,000-600,000 breeding pairs  A1, A4ii  Vulnerable 
King Penguin Aptenodytes patagonicus breeding  1989  60,000 breeding pairs  A4ii  Least Concern 
Gentoo Penguin Pygoscelis papua breeding  1989  2,000-3,000 breeding pairs  A1, A4ii  Near Threatened 
Wandering Albatross Diomedea exulans breeding  1989  750 breeding pairs  A1, A4ii  Vulnerable 
Northern Giant Petrel Macronectes halli breeding  1989  500-600 breeding pairs  A1, A4ii  Least Concern 
Kerguelen Tern Sterna virgata breeding  present  A1  Near Threatened 

Land use

Land-use Extent (% of site)
nature conservation and research -
not utilised -

References Cherel et al. (1996), Jouventin and Micol (1992), Jouventin et al. (1984, 1988, 1996), Weimerskirch and Jouventin (1997), Weimerskirch et al. (1989).

Contribute  Please click here to help BirdLife conserve the world's birds - your data for this IBA and others are vital for helping protect the environment.

Recommended citation  BirdLife International (2016) Important Bird and Biodiversity Area factsheet: Péninsule Rallier du Baty. Downloaded from on 29/10/2016

To provide new information to update this factsheet or to correct any errors, please email BirdLife