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The 51 species of sac-winged or sheath-tailed bats constitute the family Emballonuridae, and can be found in tropical and subtropical regions all over the world. Emballonurids include some of the smallest of all bats, and range from 3.5 to 10 cm in body length. They are generally brown or grey, although the ghost bats (genus ''Diclidurus'') are white. They have short tails, which project through the tail membrane, so that the latter forms a sheath. As their name indicates, most species also possess sac-shaped glands in their wings, which are open to the air and may release pheromones to attract mates. Other species have throat glands which produce strong-smelling secretions. They have the dental formula These bats prefer to roost in areas generally lighter than other species of bats. Their dwellings can often be found in hollow trees and entryways to caves or other structures. Some, such as the tomb bats, live in large roosts, but others are solitary. Species living away from the tropics may become torpid, or even hibernate in winter.〔 Sac-winged bats feed mainly on insects, and occasionally on fruit. Most of these bats, such as ghost bats, catch their meals while flying; the proboscis bat, on the other hand, catches its prey above water surfaces. ==List of species== Family Emballonuridae *Genus ''Balantiopteryx'' * *Ecuadorian sac-winged bat, ''Balantiopteryx infusca'' * *Thomas's sac-winged bat, ''Balantiopteryx io'' * *Gray sac-winged bat, ''Balantiopteryx plicata'' *Genus ''Centronycteris'' * *Thomas's shaggy bat, ''Centronycteris centralis'' * *Shaggy bat, ''Centronycteris maximiliani'' *Genus ''Coleura'' * *African sheath-tailed bat, ''Coleura afra'' * *Seychelles sheath-tailed bat, ''Coleura seychellensis'' *Genus ''Cormura'' * *Chestnut sac-winged bat, ''Cormura brevirostris'' *Genus ''Cyttarops'' * *Short-eared bat, ''Cyttarops alecto'' *Genus ''Diclidurus'' - ghost bats'' * *Northern ghost bat, ''Diclidurus albus'' * *Greater ghost bat, ''Diclidurus ingens'' * *Isabelle's ghost bat, ''Diclidurus isabellus'' * *Lesser ghost bat, ''Diclidurus scutatus'' *Genus ''Emballonura'' * *Small Asian sheath-tailed bat, ''Emballonura alecto'' * *Peters's sheath-tailed bat, ''Emballonura atrata'' * *Beccari's sheath-tailed bat, ''Emballonura beccarii'' * *Large-eared sheath-tailed bat, ''Emballonura dianae'' * *Greater sheath-tailed bat, ''Emballonura furax'' * *Lesser sheath-tailed bat, ''Emballonura monticola'' * *Raffray's sheath-tailed bat, ''Emballonura raffrayana'' * *Pacific sheath-tailed bat, ''Emballonura semicaudata'' * *Seri's Sheathtail-bat, ''Emballonura serii'' * *Western sheath-tailed bat, ''Emballonura tiavato'' *Genus ''Mosia'' * *Dark sheath-tailed bat, ''Mosia nigrescens'' *Genus ''Peropteryx'' * *Greater dog-like bat, ''Peropteryx kappleri'' * *White-winged dog-like bat, ''Peropteryx leucoptera'' * *Lesser dog-like bat, ''Peropteryx macrotis'' * *Pale-winged dog-like bat, ''Peropteryx pallidoptera'' * *Trinidad dog-like bat, ''Peropteryx trinitatis'' *Genus ''Rhynchonycteris'' * *Proboscis bat, ''Rhynchonycteris naso'' *Genus ''Saccolaimus'' * *Yellow-bellied pouched bat, ''Saccolaimus flaviventris'' * *Troughton's pouched bat, ''Saccolaimus mixtus'' * *Pel's pouched bat, ''Saccolaimus peli'' * *Naked-rumped pouched bat, ''Saccolaimus saccolaimus'' *Genus ''Saccopteryx'' * *Antioquian sac-winged bat, ''Saccopteryx antioquensis'' * *Greater sac-winged bat, ''Saccopteryx bilineata'' * *Frosted sac-winged bat, ''Saccopteryx canescens'' * *Amazonian sac-winged bat, ''Saccopteryx gymnura'' * *Lesser sac-winged bat, ''Saccopteryx leptura'' *Genus ''Taphozous'' * * Indonesian tomb bat (''Taphozous achates'') * * Coastal sheath-tailed bat (''Taphozous australis'') * * Common sheath-tailed bat (''Taphozous georgianus'') * * Hamilton's tomb bat (''Taphozous hamiltoni'') * * Hildegarde's tomb bat (''Taphozous hildegardeae'') * * Hill's sheath-tailed bat (''Taphozous hilli'') * * Arnhem sheath-tailed bat (''Taphozous kapalgensis'') * * Long-winged tomb bat (''Taphozous longimanus'') * * Mauritian tomb bat (''Taphozous mauritianus'') * * Black-bearded tomb bat (''Taphozous melanopogon'') * * Naked-rumped tomb bat (''Taphozous nudiventris'') * * Egyptian tomb bat (''Taphozous perforatus'') * * Theobald's tomb bat (''Taphozous theobaldi'') * * Troughton's sheath-tailed bat (''Taphozous troughtoni'') 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「Sac-winged bat」の詳細全文を読む スポンサード リンク
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