The Seal Islands (also known as Îles des Phoques, Islas Foca, Islotes Foca and Seal Rocks) are a group of small islands and rocky islets lying about 7 km north and north-west of
Elephant Island
Elephant Island is an ice-covered, mountainous island off the coast of Antarctica in the outer reaches of the South Shetland Islands, in the Southern Ocean. The island is situated north-northeast of the tip of the Antarctic Peninsula, west-so ...
, in the
South Shetland Islands
The South Shetland Islands are a group of Antarctic islands with a total area of . They lie about north of the Antarctic Peninsula, and between southwest of the nearest point of the South Orkney Islands. By the Antarctic Treaty of 1 ...
of
Antarctica
Antarctica () is Earth's southernmost and least-populated continent. Situated almost entirely south of the Antarctic Circle and surrounded by the Southern Ocean, it contains the geographic South Pole. Antarctica is the fifth-largest cont ...
. They extend east–west for about 5 km,
[ and are separated from Elephant Island by Sealers Passage. The group takes its name from the largest island, which Captain William Smith named Seal Island in 1820 because of the number of seals killed there.
]
Description
Seal Island, the largest in the group, has a coastline of precipitous cliffs, with a sandy beach on the western shore and some small coves. It rises to 125 m in height. It is constituted of poorly consolidated sedimentary rock
Sedimentary rocks are types of rock that are formed by the accumulation or deposition of mineral or organic particles at Earth's surface, followed by cementation. Sedimentation is the collective name for processes that cause these particles ...
s which are susceptible to wave and runoff erosion. Other islands in the group are similarly rocky with steep cliffs and few beaches. Ice-cover is seasonal.[
]
Important Bird Area
The islands, with the intervening marine zone, have been identified as a 514 ha Important Bird Area (IBA) by BirdLife International because they support several breeding colonies, totalling some 20,000 pairs, of chinstrap penguins. Other birds nesting in the group in smaller numbers include macaroni penguin
The macaroni penguin (''Eudyptes chrysolophus'') is a species of penguin found from the Subantarctic to the Antarctic Peninsula. One of six species of crested penguin, it is very closely related to the royal penguin, and some authorities consid ...
s (350 pairs), southern giant petrels, imperial shag
The imperial shag or imperial cormorant (''Leucocarbo atriceps'') is a black and white cormorant native to southern South America, primarily in rocky coastal regions, but locally also at large inland lakes. Some taxonomic authorities, including ...
s, Cape petrels, Wilson's storm petrel
Wilson's storm petrel (''Oceanites oceanicus''), also known as Wilson's petrel, is a small seabird of the austral storm petrel family Oceanitidae. It is one of the most abundant bird species in the world and has a circumpolar distribution mainly ...
s, snowy sheathbill
The snowy sheathbill (''Chionis albus''), also known as the greater sheathbill, pale-faced sheathbill, and paddy, is one of two species of sheathbill. It is usually found on the ground. It is the only land bird native to the Antarctic continent. ...
s and kelp gull
The kelp gull (''Larus dominicanus''), also known as the Dominican gull, is a gull that breeds on coasts and islands through much of the Southern Hemisphere. The nominate ''L. d. dominicanus'' is the subspecies found around South America, part ...
s. Antarctic fur seal
The Antarctic fur seal (''Arctocephalus gazella''), is one of eight seals in the genus ''Arctocephalus'', and one of nine fur seals in the subfamily Arctocephalinae. Despite what its name suggests, the Antarctic fur seal is mostly distributed i ...
s breed on the islands, with around 600 seal pups born each year. Southern elephant, Weddell, leopard and crabeater seal
The crabeater seal (''Lobodon carcinophaga''), also known as the krill-eater seal, is a true seal with a circumpolar distribution around the coast of Antarctica. They are medium- to large-sized (over 2 m in length), relatively slender and pale-c ...
s haul out there.
See also
* List of Antarctic and subantarctic islands
References
Important Bird Areas of Antarctica
Seabird colonies
Islands of the South Shetland Islands
Elephant Island
Geography of the British Antarctic Territory
Seal hunting
Penguin colonies
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