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They range in size from the Shortridge's long-fingered bat, at 3 cm (1 in) plus a 3 cm (1 in) tail, to the great bent-winged bat, at 8 cm (3 in) plus a 7 cm (3 in) tail. Like all bats, miniopterids are capable of true and sustained flight , and have wing lengths ranging from 3 cm (1 in) for many species to 6 cm (2 in) in the western bent-winged ...
The 121 extant species of Myotinae are divided between three genera: Eudiscopus and Submyotodon with one species each, and Myotis, or the mouse-eared bats, with the other 119. A few extinct prehistoric myotine species have been discovered, though due to ongoing research and discoveries the exact number and categorization is not fixed.
The common name bent-winged bat refers to their most obvious feature, the group's ability to fold back an exceptionally long third finger when the wings are folded. This finger gives the bats long, narrow wings that allows them to move at high speed in open environments and in some species to migrate over a distance of hundreds of kilometres.
Most of the wing membrane is blackish in colour, but the portion between the first and second digits is transparent, and cannot be folded closed, as it can in most other bats. The wings have an average aspect ratio of 6.6 and average wing loading of 10.9, suggesting that their flight is slow, but highly manoeuvrable.
The wings of bats are much thinner and consist of more bones than the wings of birds, allowing bats to maneuver more accurately than the latter, and fly with more lift and less drag. [59] By folding the wings in toward their bodies on the upstroke, they save 35 percent energy during flight. [ 60 ]
Close-up of male wing pouch Close-up of a greater sac-winged bat. The term "sac-winged" refers to small pouches on the wings. These sacs are used by males to attract females and to mark their harem territory. During daily grooming, males will fill these sacs with drops of urine and glandular secretions. During displays for females, the male ...
The western bent-winged bat (Miniopterus magnater) is a species of vesper bat in the family Miniopteridae. It can be found in the following countries: China , India , Indonesia , Laos , Malaysia , Myanmar , Papua New Guinea , Thailand , Timor-Leste , and Vietnam .
The smoky bat (Amorphochilus schnablii) is a species of bat in the family Furipteridae. It is the only species within the genus Amorphochilus. [citation needed] Its natural habitat is rocky shores. It is also called the thumbless bat because its thumb is partly enclosed in its wing; this common name is also applied to another species ...