Barrow Island is a island northwest off the Pilbara coast of Western Australia. The island is the second largest in Western Australia after Dirk Hartog Island.

Early history and European discovery

The island was visited by Indigenous Australians approximately 4,000 or more years ago. It separated from the mainland approximately 6,800 years ago. Stone artefacts including several weathered flakes and fragments made of igneous and metamorphic rocks and chert were collected from Barrow Island in the 1960s.

Thevenard Island Thevenard Island is located approximately off the coast of Onslow in the Pilbara region of Western Australia.Gazetteer of Australia (1996). Belconnen, ACT: Australian Surveying and Land Information Group. Description Thevenard Island is the l ...

also has evidence of Aboriginal visitation, and it is likely that the nearby Montebello Islands were utilized as well; however, there have been no archaeological finds from these islands. Navigators had noted its existence since the early 17th century, and

Nicholas Baudin Nicolas Thomas Baudin (; 17 February 1754 – 16 September 1803) was a French explorer, cartographer, naturalist and hydrographer, most notable for his explorations in Australia and the southern Pacific. Biography Early career Born a comm ...

sighted it in 1803, mistakenly believing it to be part of mainland Australia. Phillip Parker King named the island in 1816 after Sir John Barrow, a Secretary of the Admiralty and founder of the

Royal Geographical Society The Royal Geographical Society (with the Institute of British Geographers), often shortened to RGS, is a learned society and professional body for geography based in the United Kingdom. Founded in 1830 for the advancement of geographical scien ...

. Whalers were known to operate in the area from about 1800 onwards. The first recorded visit by whalers was in 1842 with continued visits occurring until 1864. The island was used as a

slave Slavery and enslavement are both the state and the condition of being a slave—someone forbidden to quit one's service for an enslaver, and who is treated by the enslaver as property. Slavery typically involves slaves being made to perf ...

trading centre for Aboriginal Australians during the 1870s by Captain William Cadell until he was arrested and removed from the colony in 1876. Slave labour was used in the nearby mainland pearling industry.

Guano Guano (Spanish from qu, wanu) is the accumulated excrement of seabirds or bats. As a manure, guano is a highly effective fertilizer due to the high content of nitrogen, phosphate, and potassium, all key nutrients essential for plant growth. G ...

was found on the island and mining began in 1883. It was mined for the remainder of the 1880s and sold to markets in Perth.

Environment

Barrow Island is noted for its flat spinifex grasslands spotted with termite mounds. While the main feature of Barrow Island's geography is the undulating limestone uplands, the island is surrounded by a mixture of sandy beaches and rocky shores, low cliffs, dunes, salt flats, and reefs. Due to its isolation from mainland Australia and protection afforded under its statutory status, Barrow Island is one of the most important conservation reserves in Western Australia. It is an "A-class" reserve, the highest level of conservation protection available for Crown land in Australia. Once a national park or class A nature reserve is made, mining leases and general purpose leases cannot be granted over them without the consent of both Houses of Parliament, and actual mining cannot take place within them without specific permission of the Minister for Environment. This occurred in 2003, when a portion of the reserve was excised in order to facilitate the Gorgon gas development program. The island is known for its diversity of mammalian fauna, including several species now extinct or greatly reduced on mainland Australia. Thirteen mammal species exist on the island, including the spectacled hare-wallaby, burrowing bettong, golden bandicoot, black-flanked rock-wallaby, Barrow Island euro and Barrow Island mouse ('' Pseudomys nanus ferculinus''). The island is also home to 43 species of terrestrial reptiles including a variety of dragons, legless lizards, geckos, skinks, snakes and monitors. The most recognisable of these is probably the perentie, Australia's biggest

lizard Lizards are a widespread group of squamate reptiles, with over 7,000 species, ranging across all continents except Antarctica, as well as most oceanic island chains. The group is paraphyletic since it excludes the snakes and Amphisbaenia alt ...

and the island's top predator. The island represents important turtle nesting habitat for the green turtle and flatback sea turtle. Some exotic species exist on the island (e.g. the American cockroach) but the island fauna is largely intact. Black rats (''Rattus rattus'') were discovered to have established in 1990, but were eradicated by the Department of Parks and Wildlife (then CALM). Current threats include invasive species (including weeds,

feral cats A feral cat or a stray cat is an unowned domestic cat (''Felis catus'') that lives outdoors and avoids human contact: it does not allow itself to be handled or touched, and usually remains hidden from humans. Feral cats may breed over dozens ...

, common house gecko, etc.) establishing on the island, clearing for development, fire and disease. Limestone caves on Barrow Island support subterranean ecological communities. These include endemic and vulnerable species. Invertebrate species include Stygofauna, amphipod crustaceans, of ''Nedsia'', ''Liagoceradocus'' and other genera. These mostly inhabit an anchialine system, a 'lens' of fresh water above the saline ground water, which they share with cave fish species such as the blind cave eel (''Blind cave eel, Ophisternon candidum''), and two blind cave gudgeons, ''Milyeringa veritas'' and ''Milyeringa justitia''. Troglofauna have also been discovered within the cave systems; these include the schizomid ''Draculoides bramstokeri'' and perhaps the only Troglobite, troglobitic reptile—''Anilios longissimus''. Hydrogen sulphide produced by the "Barrow fault" may sustain this diverse community through chemoautotrophic energy production.

Birds

Barrow Island has been classified by BirdLife International as an Important Bird Area. Birds include the Barrow Island black-and-white fairy-wren (''Malurus leucopterus edouardi''), an endemism, endemic subspecies of the white-winged fairy-wren which is regarded as vulnerable species, vulnerable to extinction. The island also supports over 1% of the world populations of grey-tailed tattler, red-necked stint, pied oystercatcher, and fairy tern, as well as an isolated population of the spinifexbird.

Conservation

The Western Shield project has sought to reduce the impact of introduced species to the region. Corporate and state government cooperation on programs has produced studies into the little-known subterranean fauna of the island.

Energy reserves

Oil

Conventional oil, Oil was discovered on the island in commercial quantities in 1964 by West Australian Petroleum Pty Ltd (WAPET), and the first oil field was established shortly after. In 1995, there were 430 wells producing oil and natural gas across most of the southern half of the island. The site has been Australia's leading producer of oil. Oil tankers are filled by a submarine pipeline transport, pipeline that extends offshore. WAPET established a 200-room apartment complex for workers on the island. A private airport facility known as Barrow Island Airport was also established to transport workers and equipment from Karratha, Western Australia, Karratha and Perth.

Gas

In December 2009, a development consortium between the Australian subsidiaries of Chevron Corporation, Chevron, ExxonMobil, and Royal Dutch Shell, Shell received environmental approvals from the Government of Western Australia to develop natural gas reserves north of the island. Known as the Gorgon gas project, it was completed in 2017. Offering an estimated of gas makes it one of Australia's largest developments.

Climate

Highest wind record

The World Meteorological Organization established Barrow Island as the location of the highest non-Tornado, tornadic wind gust ever recorded, at 408 km/h (253 mph).World Record Wind Gust: 408 km/h
. World Meteorological Organization. The gust occurred on 10 April 1996, during Cyclone Olivia, Severe Tropical Cyclone Olivia.Courtney, J., et al. 2012
Documentation and verification of the world extreme wind gust record: 113.3 m/s on Barrow Island, Australia, during passage of tropical cyclone Olivia. ''Australian Meteorological and Oceanographic Journal'' 62: 1-9. The previous record was a 372 km/h (231 mph) gust at Mount Washington, New Hampshire, United States in April 1934.