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The velvety free-tailed bat is a medium-sized bat, with a length of 4 inches (100 mm) and with a wingspan of 11–13 inches (280–330 mm). This species is brown in color; however, when seen flying around at dusk, it will appear to be black. The tail of the velvety free-tailed bat is long and extends beyond the tail membrane.
Townsend's big-eared bat is a medium-sized bat (7–12 g) [2] with extremely long, flexible ears, and small yet noticeable lumps on each side of the snout. Its total length is around 10 cm (4 in.), its tail being around 5 cm (2 in) and its wingspan is about 28 cm (11 in). The dental formula of Corynorhinus townsendii is 2.1.2.3. 3.1.3.3.
The long-fingered bat is a medium-sized vesper bat with characteristically large feet (hence its name), and more prominent nostrils than other European Myotis species. Its length ranges from 47–53 mm (1.9–2.1 in), and it weighs up to 7–13 g (0.25–0.46 oz). [2]
The Alpine long-eared bat is a medium-sized bat, with a forearm length of approximately 4 centimetres (1.6 in) and a body weight of 6 to 10 grams (0.21 to 0.35 oz). It has pale grey fur over the body, fading to near-white on the underparts and with a dark brown face. The ears are long and a pinkish triangular pad projects downwards from the chin.
The lesser long-nosed bat (Leptonycteris yerbabuenae) is a medium-sized bat found in Central and North America. [1] It is sometimes known as Sanborn's long-nosed bat or the Mexican long-nosed bat, though the latter name is better avoided since it is also used for the entire genus Leptonycteris and for one of the other species in it, the greater long-nosed bat (L. nivalis).
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The barbastelle is a medium-sized bat, with a characteristic pug-shaped nose. The ears are broad, joined across its head by skin, and covered in gingery-brown fur on the rear surface. The tragus is triangular – broad at the base but with a nearly parallel tip which starts about halfway along its length. Head and body length is between 40 and ...
All species are similar in that they lack upper incisors, though not all species have the same dental formulae. [2] The lesser false vampire bat and greater false vampire bat have a dental formula of 0.1.2.3 2.1.2.3 × 2 = 28, while the ghost bat, heart-nosed bat, Thongaree's disc-nosed bat, and yellow-winged bat have a dental formula of 0.1.1 ...