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Kitti's hog-nosed bat (''Craseonycteris thonglongyai''), also known as the bumblebee bat, is a vulnerable species of bat and the only extant member of the family Craseonycteridae. It occurs in western Thailand and southeast Burma, where it occupies limestone caves along rivers. Kitti's hog-nosed bat is the smallest species of bat and arguably the world's smallest mammal. It has a reddish-brown or grey coat, with a distinctive pig-like snout. Colonies range greatly in size, with an average of 100 individuals per cave. The bat feeds during short activity periods in the evening and dawn, foraging around nearby forest areas for insects. Females give birth annually to a single offspring. Although the bat's status in Burma is not well known, the Thai population is restricted to a single province and may be at risk for extinction. Its potential threats are primarily anthropogenic, and include habitat degradation and the disturbance of roosting sites.〔 ==Description== Kitti's hog-nosed bat is about in length and in mass.〔Donati, Annabelle, and Pamela Johnson. "Which mammal is the smallest?." I wonder which snake is the longest: and other neat facts about animal records. Racine, Wis.: Western Pub. Co., 1993. 8. Print.〕 hence the common name of "bumblebee bat". It is the smallest species of bat and may be the world's smallest mammal, depending on how size is defined. The main competitors for the title are small shrews; in particular, the Etruscan shrew may be lighter at but is longer, measuring from its head to the base of the tail. The bat has a distinctive swollen, pig-like snout〔 with thin, vertical nostrils. Its ears are relatively large, while its eyes are small and mostly concealed by fur.〔Goswami, A. 1999. (''Craseonycteris thonglongyai'' ), Animal Diversity Web. Retrieved on 11 April 2008.〕 Its teeth are typical of an insectivorous bat.〔 The dental formula is 1:1:1:3 in the upper jaw and 2:1:2:3 in the lower jaw,〔 with large upper incisors.〔 The bat's upperparts are reddish-brown or grey, while the underside is generally paler.〔 The wings are relatively large and darker in colour, with long tips that allow the bat to hover.〔 Despite having two caudal vertebrae, Kitti's Hog-nosed Bat has no visible tail.〔 There is a large web of skin between the hind legs (the uropatagium) which may assist in flying and catching insects, although there are no tail bones or calcars to help control it in flight.〔〔〔Meyers, P. 1997. (Bat Wings and Tails ), Animal Diversity Web. Retrieved on 12 April 2008.〕 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「Kitti's hog-nosed bat」の詳細全文を読む スポンサード リンク
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