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Stephens Island (New Zealand)
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・ Stephens Island wren
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Stephens Island (New Zealand) : ウィキペディア英語版
Stephens Island (New Zealand)

Stephens Island is at the northernmost tip of the Marlborough Sounds in the South Island of New Zealand. It lies two kilometres to the northeast of Cape Stephens, the northernmost point of D'Urville Island. The Māori call the island Takapourewa but Stephens Island is the commonly used name. The island is in size, and rises high from the sea.
The island featured in local mythos as the place where a local lighthouse keeper's cat, named Tibbles, was claimed to have caused the extinction of the Stephens Island Wren in 1894. However, this belief was erroneous,〔Medway, D.G. (2004) The land bird fauna of Stephens Island, New Zealand in the early 1890s, and the cause of its demise. ''Notornis'', 51:201-211.〕 an urban legend. While this cat did kill one of the last birds seen, a few more specimens were obtained in the following years, by which time the island also hosted numerous feral cats, and the island was only the last refuge of the bird, which had become extinct on the mainland many centuries earlier due to Polynesian rat predation.
Today, the best known residents of Stephens Island are the tuatara. The island is a sanctuary for this rare type of reptile which is now extinct on the mainland, except in tightly controlled reserves including ecological islands.
Takapourewa is internationally important for nature conservation. While most attention has focused on tuatara, the significant and unique factors include:
* Endemic species – those found nowhere else, either because they evolved here or because they have become extinct everywhere else – such as Hamilton's Frog, perhaps the rarest frog in the world and the Ngaio Weevil, a large flightless Weevil
* Unusual species such as tuatara - members of the genus Sphenodon being the sole survivors of a group of reptiles that otherwise appears to have been extinct elsewhere in the world for more than 60 million years
* Rare species – such as the Stephen's Island gecko and Cook Strait click beetle that are only found in a handful of other places, and for which Takapourewa is a stronghold
* Common species in unusual abundance – such as the more than one million seabirds, vast numbers of wetas and darkling beetles and many more
* Takapourewa is a part of a complex ecosystem that includes a vast area of ocean. An enormous number of seabirds link this small (154 ha) island to a vast marine ecosystem. The sea provides nutrients, the seabirds carry these to the island and Takapourewa provides a sanctuary for nesting birds, free of mammalian land predators.
In natural character, Takapourewa is a rugged landmass dominated by maritime influences. Visually the island is connected to the adjacent larger D’Urville Island, and Takapourewa is the largest of the family of islands, islets and rock stacks that characterise this south-western side of Cook Strait. The island has been extensively modified by land clearance and farming, but retains much of its wild natural character. From sea level the lighthouse is a prominent visual feature, while from the air the cluster of buildings and farmed landscape are obvious.
The surrounding sea is rich with marine life, albeit strongly modified and depleted by fishing, and historically by hunting of whales and seals. The island overlooks one of the great whale migration routes, most notably for humpback whales. Marine mammals such as New Zealand fur seals and various dolphin species are seen around the island.
This is an area of strong winds (mean annual wind speed ), strong currents and broken restless seas. The island also harbours strong gradations of weather between the often cloud-covered summit and the wave-lashed shores. There are also distinct differences between the relatively more exposed western and the less exposed eastern shores. Rainfall averages a modest .
== See also ==

* List of islands of New Zealand
* Cats in New Zealand

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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