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Desert elephant
Desert elephants are not a distinct species of elephant but are African bush elephants (''Loxodonta africana'') that have made their homes in the Namib and Sahara deserts. It was believed at one time that they were a subspecies of the African bush elephant but this is no longer thought to be the case. Desert-dwelling elephants were once more widespread in Africa than they are now and are currently found only in Namibia and Mali. They tend to migrate from one waterhole to another following traditional routes which depend on the seasonal availability of food and water. They face pressure from poaching and from changes in land use by humans.
==Namibia==
The Kunene Region in the north-west of Namibia is an area of mostly sandy desert, rocky mountains and stony plains which covers about .〔 Elephants have traditionally lived in this area and in the earlier part of the 20th century there were about 3,000 in the Kunene Region. By the 1980s these had greatly diminished in number, however since then, conservation measures have been put in place and by 2013 the number of elephants had increased to about 600.〔(【引用サイトリンク】title=Desert elephants )〕 In 1995-6 there were good rains in Namibia and the elephants expanded their range southwards to the Ugab River.〔(【引用サイトリンク】title=Desert elephants )〕
In the Hoanib River area male elephants have tusks but about a third of the female elephants there are tuskless. Adult bull desert elephants are usually solitary and roam over large areas. One was recorded as travelling between the Skeleton Coast National Park and the Etosha National Park in a few months. Other bulls have occasionally moved into the area from better-watered regions to the east. The family groups in which most desert elephants move are small and usually consist of a female elephant and her offspring or two sisters and their dependent young. They tend to stay near the ephemeral rivers where there is greater availability of food. Some groups are resident in the Hoarusib River valley and a single group stays permanently near the Hoanib River while other groups move between the two, a distance of about . They usually make the trek in a single night, when the temperature is cooler than by day. At certain times of year they move inland along narrow traditional paths to mountain areas in search of myrrh bushes (''Commiphora'' spp.) which seem to be a favourite foodstuff.〔(【引用サイトリンク】title=About desert elephants )〕
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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