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West Wallabi Island is an island in the Wallabi Groupmarker of the Houtman Abrolhosmarker, located in the Indian Oceanmarker off the west coast of mainland Australia.


West Wallabi Island played an important role in the story of the Bataviamarker shipwreck and massacre. Following the shipwreck in 1629, a group of soldiers under the command of Wiebbe Hayes were put ashore there to search for water. A group of mutineers who took control of the other survivors left them there in the hope that they would starve or die of thirst. However the soldiers discovered that they were able to wade to East Wallabi Islandmarker, where there was a fresh water spring. Furthermore, West and East Wallabi Island are the only islands in the group upon which the Tammar Wallaby lives. Thus the soldiers had access to sources of both food and water that were unavailable to the mutineers. Later the mutineers mounted a series of attacks, which the soldiers beat off. The remnants of improvised defensive walls and stone shelters built by Wiebbe Hayes and his men on West Wallabi Island are Australia's oldest known European structures, more than a century and a half before expeditions to the Australian continent by James Cook and Arthur Phillip.

In the context of the Batavia mutiny and massacre, East Wallabi Island is often referred to as "Wiebbe Hayes' Island". This was the name given it in contemporary sources, and was used by historians for as long as it remained a lost toponym.


Nominally located at , West Wallabi Island is the largest island in the Houtman Abrolhos. It is located in in the north-west of the Wallabi Groupmarker, the northernmost of three island groups in the Houtman Abrolhos.

The island contains three named points: Slaughter Point, Blowfish Point and Pelican Point. Between Blowfish Point and Pelican Point is a bay named Shag Bay, and south of Pelican Point is a bay named Horseyard Bay.

The island is surrounded by submerged coral reef. This is narrow at Shag Bay, but fairly extensive along the rest of the coast. To the north-east, the reef is high enough that a person may wade from island to island; islands connected to West Wallabi Island in this way include Barge Rock, Turnstone Island, Seagull Island, Oystercatcher Island and East Wallabi Islandmarker.

Geology and physiography

The basement of West Wallabi Island is the Wallabi Limestone, a dense calcret, coral limestone platform that underlies the entire Wallabi Group. This platform, which arises abruptly from a flat shelf, is about 40 metres thick, and is of Quaternary origin. Reef that formed during the Eemian interglacial (about 125,000 years ago), when sea levels were higher than at present, are now emergent in places, and constitute the basement of the group's central platform islands, which include West Wallabi Island.

The basement is capped in some places by an aeolianite pavement, and this is in turn overlain in places by sand dunes.


As one of the few islands in the Houtman Abrolhos large enough to support dune systems, West Wallabi Island supports a relatively high diversity of plant life: according to survey published in 2001, 97 plant species occur on the island. Both the dunes and the pavement limestone support species-rich vegetation complexes dominated by chenopod shrubs, and these communities have been identified has having species conservation importance, because they are so diverse, yet so easily disturbed and so slow to recover.


  1. Australian Broadcasting Company (2003). Shipwrecks: Batavia.
  2. Batavia Shipwreck Site and Survivor Camps Area 1629 (2008). Department of the Environment, Water, Heritage and the Arts.
  3. Elder, Bruce (2005). The Brutal Shore. The Sydney Morning Herald.

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