The Lowendal Islands comprise an

archipelago An archipelago ( ), sometimes called an island group or island chain, is a chain, cluster, or collection of islands, or sometimes a sea containing a small number of scattered islands. Examples of archipelagos include: the Indonesian Arc ...

, with a total area of about 160 ha of land lying off the coast of

Western Australia Western Australia (commonly abbreviated as WA) is a state of Australia occupying the western percent of the land area of Australia excluding external territories. It is bounded by the Indian Ocean to the north and west, the Southern Ocean to th ...

. It is important for breeding

seabird Seabirds (also known as marine birds) are birds that are adapted to life within the marine environment. While seabirds vary greatly in lifestyle, behaviour and physiology, they often exhibit striking convergent evolution, as the same enviro ...

Description

The archipelago lies 10 km north-east of the much larger

Barrow Island Barrow Island may refer to: * Barrow Island (Western Australia), Australia * Barrow Island (Queensland), Australia * Barrow Island, Barrow-in-Furness Barrow Island is an area and electoral ward of Barrow-in-Furness, Cumbria, England. Origina ...

, and 15 km south of the

Montebello Islands The Montebello Islands, also rendered as the Monte Bello Islands, are an archipelago of around 174 small islands (about 92 of which are named) lying north of Barrow Island and off the Pilbara coast of north-western Australia. The islands f ...

, about 120 km west of the port of Dampier. Of the 34 islands, the largest is 83 ha

Varanus Island Varanus Island is the largest of the Lowendal Islands, an archipelago off the north west coast of Western Australia, near Karratha in the Pilbara region. The island is approximately from the mainland coast. It is located at .Gazetteer of Austral ...

, 2.5 km long by 600 m wide. Other large islands are Bridled (27 ha), Abutilon (27 ha), Parkinsonia (10 ha) and Beacon (1.5 ha). Geologically, the islands are formed of uplifted and sparsely vegetated

limestone Limestone ( calcium carbonate ) is a type of carbonate sedimentary rock which is the main source of the material lime. It is composed mostly of the minerals calcite and aragonite, which are different crystal forms of . Limestone forms whe ...

. The inshore waters of the archipelago support

coral reef A coral reef is an underwater ecosystem characterized by reef-building corals. Reefs are formed of colonies of coral polyps held together by calcium carbonate. Most coral reefs are built from stony corals, whose polyps cluster in groups. C ...

s as well as beds of

seagrass Seagrasses are the only flowering plants which grow in marine environments. There are about 60 species of fully marine seagrasses which belong to four families (Posidoniaceae, Zosteraceae, Hydrocharitaceae and Cymodoceaceae), all in the or ...

and seaweed. Varanus Island houses a

gas separation Gas separation can refer to any of a number of techniques used to separate gases, either to give multiple products or to purify a single product. Swing adsorption techniques Pressure swing adsorption Pressure swing adsorption (PSA) pressurize ...

plant, oil storage tanks and a

pipeline Pipeline may refer to: Electronics, computers and computing * Pipeline (computing), a chain of data-processing stages or a CPU optimization found on ** Instruction pipelining, a technique for implementing instruction-level parallelism within a s ...

for loading offshore

tankers Tanker may refer to: Transportation * Tanker, a tank crewman (US) * Tanker (ship), a ship designed to carry bulk liquids ** Chemical tanker, a type of tanker designed to transport chemicals in bulk ** Oil tanker, also known as a petroleum tank ...

Birds

The archipelago has been identified by BirdLife International as an Important Bird Area (IBA) because it regularly supports over 1% of the world populations of crested and

bridled tern The bridled tern (''Onychoprion anaethetus'') is a seabird of the family Laridae. It is a bird of the tropical oceans. The scientific name is from Ancient Greek. The genus comes from ' meaning "claw" or "nail", and , meaning "saw". The specific ...

s. Other seabirds recorded as having bred on the islands include

wedge-tailed shearwater The wedge-tailed shearwater (''Ardenna pacifica'') is a medium-large shearwater in the seabird family Procellariidae. It is one of the shearwater species that is sometimes referred to as a muttonbird, like the sooty shearwater of New Zealand and ...

pied cormorant The Australian pied cormorant (''Phalacrocorax varius''), also known as the pied cormorant, pied shag, or great pied cormorant, is a medium-sized member of the cormorant family. It is found around the coasts of Australasia. In New Zealand, it ...

s, roseate, lesser crested and

Caspian tern The Caspian tern (''Hydroprogne caspia'') is a species of tern, with a subcosmopolitan but scattered distribution. Despite its extensive range, it is monotypic of its genus, and has no accepted subspecies. The genus name is from Ancient Greek ' ...

s, and

silver gull The silver gull (''Chroicocephalus novaehollandiae'') is the most common gull of Australia. It has been found throughout the continent, but particularly at or near coastal areas. It is smaller than the Pacific gull (''Larus pacificus''), which ...

s.BirdLife International. (2011). Important Bird Areas factsheet: Lowendal Islands. Downloaded from http://www.birdlife.org on 08/08/2011.

References

Islands of the Pilbara Important Bird Areas of Western Australia {{WesternAustralia-geo-stub