Hogan Island, the largest island of the

Hogan Group The Hogan Group is a collection of six (to eight) islands and islets located in the Bass Strait that define part of the border between mainland Australia and the island state of Tasmania. Within the jurisdiction of Tasmania, the Hogan Group for ...

, is a

granite Granite () is a coarse-grained (phaneritic) intrusive igneous rock composed mostly of quartz, alkali feldspar, and plagioclase. It forms from magma with a high content of silica and alkali metal oxides that slowly cools and solidifies undergro ...

island An island (or isle) is an isolated piece of habitat that is surrounded by a dramatically different habitat, such as water. Very small islands such as emergent land features on atolls can be called islets, skerries, cays or keys. An island ...

, located in northern

Bass Strait Bass Strait () is a strait separating the island state of Tasmania from the Australian mainland (more specifically the coast of Victoria, with the exception of the land border across Boundary Islet). The strait provides the most direct waterwa ...

, that lies between the

Furneaux Group The Furneaux Group is a group of approximately 100 islands located at the eastern end of Bass Strait, between Victoria and Tasmania, Australia. The islands were named after British navigator Tobias Furneaux, who sighted the eastern side of th ...

in north-east

Tasmania ) , nickname = , image_map = Tasmania in Australia.svg , map_caption = Location of Tasmania in AustraliaCoordinates: , subdivision_type = Country , subdi ...

, and

Wilsons Promontory Wilsons Promontory, is a peninsula that forms the southernmost part of the Australian mainland, located in the state of Victoria. South Point at is the southernmost tip of Wilsons Promontory and hence of mainland Australia. Located at nearb ...

Victoria Victoria most commonly refers to: * Victoria (Australia), a state of the Commonwealth of Australia * Victoria, British Columbia, provincial capital of British Columbia, Canada * Victoria (mythology), Roman goddess of Victory * Victoria, Seychelle ...

, Australia. The island has a maximum elevation of .

Features

Together with the other islands in the Hogan,

Kent Kent is a county in South East England and one of the home counties. It borders Greater London to the north-west, Surrey to the west and East Sussex to the south-west, and Essex to the north across the estuary of the River Thames; it faces ...

and Furneaux groups, Hogan Island formed part of a land bridge that connected Tasmania to mainland Australia until the end of the

Pleistocene The Pleistocene ( , often referred to as the ''Ice age'') is the geological Epoch (geology), epoch that lasted from about 2,580,000 to 11,700 years ago, spanning the Earth's most recent period of repeated glaciations. Before a change was fina ...

period. After the glacial period ended, the Hogan Group were the first islands to become isolated by

rising sea levels Rising may refer to: * Rising, a stage in baking - see Proofing (baking technique) *Elevation * Short for Uprising, a rebellion Film and TV * "Rising" (''Stargate Atlantis''), the series premiere of the science fiction television program ''Starga ...

. The islands were named in 1802 by John Black, captain of the

brig A brig is a type of sailing vessel defined by its rig: two masts which are both square rig, square-rigged. Brigs originated in the second half of the 18th century and were a common type of smaller merchant vessel or warship from then until the ...

Harbinger A harbinger is a forerunner or forewarning, but may also refer to: Companies * Harbinger Corp., an Internet-oriented business * Harbinger Capital, a hedge fund * Harbinger Knowledge Products, an eLearning products and content services company ...

'', after Michael Hogan, the owner of his ship. The ''Harbinger'' was the first vessel to sail through Bass Strait after its discovery by Bass and

Flinders Flinders may refer to: Places Antarctica * Flinders Peak, near the west coast of the Antarctic Peninsula Australia New South Wales * Flinders County, New South Wales * Shellharbour Junction railway station, Shellharbour * Flinders, New South Wa ...

. From that time,

sealers Sealer may refer either to a person or ship engaged in seal hunting, or to a sealant; associated terms include: Seal hunting * Sealer Hill, South Shetland Islands, Antarctica * Sealers' Oven, bread oven of mud and stone built by sealers around 180 ...

inhabited, or regularly visited, the islands. After the mass killing of

seals Seals may refer to: * Pinniped, a diverse group of semi-aquatic marine mammals, many of which are commonly called seals, particularly: ** Earless seal, or "true seal" ** Fur seal * Seal (emblem), a device to impress an emblem, used as a means of a ...

made sealing less viable, sealers turned to hunting kangaroos or farming. On 12 October 1900, the first lease for Hogan Island was recorded. While the original lease covered the entire island group, since 1959 it has only applied to Hogan Island and, from 1967, was held by B. R. Stackhouse, who used the island for cattle and sheep grazing. However, that activity ceased after causing considerable damage to the vegetation and the natural springs there.

Fauna

Recorded 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 ...

and

wader 245px, A flock of Dunlins and Red knots">Red_knot.html" ;"title="Dunlins and Red knot">Dunlins and Red knots Waders or shorebirds are birds of the order Charadriiformes commonly found wikt:wade#Etymology 1, wading along shorelines and mudflat ...

species include

little penguin The little penguin (''Eudyptula minor'') is a species of penguin from New Zealand. They are commonly known as little blue penguins or blue penguins owing to their slate-blue plumage and are also known by their Māori name . The Australian lit ...

short-tailed shearwater The short-tailed shearwater or slender-billed shearwater (''Ardenna tenuirostris''; formerly ''Puffinus tenuirostris''), also called yolla or moonbird, and commonly known as the muttonbird in Australia, is the most abundant seabird species in A ...

also known as the muttonbird,

Pacific gull The Pacific gull (''Larus pacificus'') is a very large gull, native to the coasts of Australia. It is moderately common between Carnarvon in the west, and Sydney in the east, although it has become scarce in some parts of the south-east, as a re ...

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 ...

and

sooty oystercatcher The sooty oystercatcher (''Haematopus fuliginosus'') is a species of oystercatcher. It is a wading bird endemic to Australia and commonly found on its coastline. It prefers rocky coastlines, but will occasionally live in estuaries. All of its fea ...

Reptile Reptiles, as most commonly defined are the animals in the class Reptilia ( ), a paraphyletic grouping comprising all sauropsids except birds. Living reptiles comprise turtles, crocodilians, squamates (lizards and snakes) and rhynchocephalians ( ...

s present are the

eastern blue-tongued lizard The ''Tiliqua scincoides scincoides,'' or eastern blue-tongued lizard, is native to Australia. It is unique due to its blue tongue, which can be used to warn off predators. In addition to flashing its blue tongue, the skink hisses and puffs up its ...

metallic skink :''"Metallic skink" may also refer to the garden skink (Lampropholis delicata)''. ''Carinascincus metallicus'', the metallic cool-skink or metallic skink is a species of skink in the family Scincidae. It is endemic to Australia, found in south ...

three-lined skink The eastern three-lined skink (''Acritoscincus duperreyi''), also known commonly as the bold-striped cool-skink, is a species of skink, a lizard in the family Scincidae. The species is endemic to Australia. ''A. duperreyi'' has been extensivel ...

Bougainville's skink Bougainville's skink (''Lerista bougainvillii'') is a species of skink, a lizard in the family Scincidae. This species is also commonly called the south-eastern slider and Bougainville's lerista. Etymology The specific name, ''bougainvillii ...

and

White's skink White's skink (''Liopholis whitii)'', also known commonly as White's rock skink, is a species of lizard in the family Scincidae. The species is endemic to Australia. Etymology The specific name, ''whitii'', is in honour of Irish surgeon and ...

.Brothers, Nigel; Pemberton, David; Pryor, Helen; & Halley, Vanessa. (2001). ''Tasmania’s Offshore Islands: seabirds and other natural features''. Tasmanian Museum and Art Gallery: Hobart. Feral goats were present for some time also.

State border

The state border between Tasmania and Victoria lies in the Hogan Group and passes over land on the North East Islet, thus giving a land border between the two states. Before Victoria became a colony, it was agreed that New South Wales would have the sovereignty of all the land to Bass Strait, and Tasmania would have Bass Strait, except for waters near the coast. The original intention was that these Bass Strait Islands would be part of Tasmania, but the surveyed position for Wilson's Promontory was slightly off, and the border placed too far south at 39°12' S. Once this was discovered the Islet was renamed to

Boundary Islet Boundary Islet, historically known as North East Islet, is a islet in the Hogan Island Group of Bass Strait, at a latitude of 39°12′ S, about east of the southernmost point of mainland Victoria. The islet straddles the maritime border of ...

. The land border is long.

References

{{Islands of Tasmania Hogan Group

Features

Fauna

State border

See also

References