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Brachaspis robustus : ウィキペディア英語版
Brachaspis robustus

''Brachaspis robustus'' is an endangered protected species of grasshopper from South Island, New Zealand. Two species of grasshoppers are listed for protection under the Wildlife Act 1953 of New Zealand this include ''B. robustus'' and Sigaus childi.〔(【引用サイトリンク】title=Schedule 7 Terrestrial and freshwater invertebrates declared to be animals )Sigaus takahe is also protection under the Wildlife Act 1953 indirectly as it is only known from the Murchison Mountains Specially Protected (Takahē) Area. ''Brachaspis robustus'' is very distinctive from all other New Zealand grasshoppers as its escape behaviour is heavily dependent on its cryptic colouring and most time relies on motionless behaviour rather than active escape.

In 1993 it was estimated that were only approximately 800 adults in the wild.〔 By the end of 2009/2010 summer it is estimated that the adults populations has decline to approximately 600 adults. Whereby in 1993, most adults were found in three key very large populations and only a few sub-populations, by 2010, numerous new sub-populations have been discover, however, the three key populations from 1993 are now very sparse and made up of numerous sub-populations.

The genus ''Brachaspis'' is endemic to the South Island of New Zealand.
==Distribution and habitat==
''Brachaspis robustus'' is only known from the Tekapo River system in the Mackenzie Basin. It can be found as far south as the Lake Benmore () and as far north as the upper Fork Stream (). ''Brachaspis robustus'' is known between on the lower Ohau River and the upper Fork Stream, but prefer altitudes between . Detailed searches since 1980 have been carried out throughout the Mackenzie Basin and a good understanding of it current distribution is now known. ''Brachaspis robustus'' is always found in very rocky areas (stony floodplain terraces, fluvio-glacial outwash, recent fluvial outwash and rocky braided river), and never found in vegetation.〔Morris, S.J. ''Grasshopper Identification Sheet - Brachaspis robustus.'' Department of Conservation, Alexandra.〕

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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