Hogan Island
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Hogan Island, the largest island of the Hogan Group, 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 un ...
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 isla ...
, located in northern
Bass Strait Bass Strait () is a strait separating the island states and territories of Australia, state of Tasmania from the Australian mainland (more specifically the coast of Victoria (Australia), Victoria, with the exception of the land border across Bo ...
, 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 ...
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 nea ...
in
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 ''Starg ...
. 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-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 latter part ...
''
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 compan ...
'', after Michael Hogan, the owner of his ship. The ''Harbinger'' was the first vessel to sail through Bass Strait after its discovery by
Bass Bass or Basses may refer to: Fish * Bass (fish), various saltwater and freshwater species Music * Bass (sound), describing low-frequency sound or one of several instruments in the bass range: ** Bass (instrument), including: ** Acoustic bass gui ...
and Flinders. From that time, sealers 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 envir ...
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 li ...
,
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 rhynchocephalia ...
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 sout ...
, three-lined skink,
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. The land border is long.


See also

*
List of islands of Tasmania Tasmania is the smallest and southernmost state of Australia. The Tasmanian mainland itself is an island, with an area of - 94.1% of the total land area of the state. The other islands have a combined area of , for a cumulative total of 99.75% o ...


References

{{Islands of Tasmania Hogan Group