Gerlache Island is the largest of the Rosenthal Islands lying off Gerlache Point on the west coast of Anvers Island, in the Palmer Archipelago of Antarctica. It was first roughly charted and named "Pointe de Gerlache" by the French Antarctic Expedition, 1903–05, under Jean-Baptiste Charcot, for Lieutenant Adrien de Gerlache. As a result of surveys by the Falkland Islands Dependencies Survey in 1956–58, this island is considered to be the feature named by Charcot; there is no prominent point in this vicinity which would be visible from seaward.
Important Bird Area
A small (41 ha) islet lying about 4.5 km to the south of Gerlache, and 500 m off the west coast of Anvers, has been identified as an Important Bird Area (IBA) by BirdLife International because it supports a breeding colony of gentoo penguins, with about 3000 pairs recorded there in 1987. It lies within ASMA 7 - Southwest Anvers Island and Palmer Basin.
- Punta de Gerlache. SCAR Composite Antarctic Gazetteer.
- "Gerlache Island". Geographic Names Information System. United States Geological Survey. Retrieved 2012-04-22.
- "Islet south of Gerlache Island, Palmer Archipelago". BirdLife data zone: Important Bird Areas. BirdLife International. 2013. Retrieved 2013-01-09.
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