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''Histiotus'' is a genus of South American vesper bats with species that include: * Strange big-eared brown bat (''Histiotus alienus'') * Humboldt big-eared brown bat (''Histiotus humboldti'') * Thomas's big-eared brown bat (''Histiotus laephotis'') * Big-eared brown bat (''Histiotus macrotus'') * Southern big-eared brown bat (''Histiotus magellanicus'') * Small big-eared brown bat (''Histiotus montanus'') * Tropical big-eared brown bat (''Histiotus velatus'') The bat or the order ''Chiroptera'' is the second-largest mammalian order and represents more than half of all mammalian species in many neo-tropical communities. Bats have been found to be abundant in the tropics and contribute to patterns of species richness and diversity, yet most research of bat communities comes from studies done in North and Central America. Little information is known of the communities in the tropical and temperate zones. Most species of ''Histiotus'' are rare in Paraguay, known only from a few records, they are not abundant or widespread, and have been collected for the first time only recently. Researchers have been able to collect many of the ''Histiotus'' at human dwellings or around domestic animals, due to the significant increase in human activity in the Paraguayan Chaco over the last 20 years.〔http://encore.apu.edu:50080/ebsco-web/ehost/pdfviewer/pdfviewer?sid=cce74e59-cf1b-44ae-ac2d-a0d6360bbdf6%40sessionmgr12&vid=2&hid=8〕〔http://www.ciidirdgo.net/sitiocelia/publicaciones/Lopez-Gonzalez%202004.pdf〕 ==Habitat== ''Histiotus'' is found in the tropical and temperate zones in South America. Their natural habitat ranges from areas with rocky mountains, to woods in Paraguay, Peru, Brazil, Argentina and Chile.〔http://www.scielo.cl/pdf/rchnat/v78n2/art05.pdf〕 Only ''Histiotus macrotus'' is specifically found in the Dry Chaco region, which is part of the Gran Chaco region. A strong significant correlation, was found by researchers for the distribution of ''Histiotus'' related to the composition of the vegetation in Paraguay.〔http://encore.apu.edu:50080/ebsco-web/ehost/pdfviewer/pdfviewer?sid=51c979f8-783b-426f-be05-9fe65ddb255e%40sessionmgr4&vid=2&hid=111〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Histiotus」の詳細全文を読む スポンサード リンク
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