Common Vampire Bat - Physical Description

Physical Description

The common vampire bat is short-haired, with silver-gray fur on its undersides, sharply demarcated from the darker fur on its back. It has small, somewhat rounded ears, a deeply-grooved lower lip, and a flat, leaf-shaped nose. A well-developed, clawed thumb on each wing is used to climb onto prey and to assist the animal in take-off. The bat averages about 9 cm (3.5 in) long with a wingspan of 18 cm (7 in). It commonly weighs about 57 grams (2 oz), but its weight can double after a single feeding. The braincase is relatively large, but the snout is reduced to accommodate large incisors and canines. It has the fewest teeth among bats. The upper incisors lack enamel, which keeps them razor-sharp. Common vampire bats exhibit sexual dimorphism in which females are bigger than males.

While most other bats have almost lost the ability to maneuver on land, vampire bats are an exception. They can run using a unique, bounding gait in which the forelimbs are used instead of the hindlimbs to propel forward, as the wings are much more powerful than the legs. This ability likely evolved independently within the bat lineage. Three pads under the thumb function like a sole. It is also capable of leaping in various directions, magnitudes and temporal sequences. When making a jump, the bat pushes up with its pectoral limbs. The hindlimbs keep the body over the pectoral limbs which are stabilized by the thumbs.

Common vampire bats have good eyesight compared to other bats. They are able to distinguish different optical patterns and may use vison for long-range orientation. These bats also have well-developed senses of smell and hearing: the cochlea is highly sensitive to low-frequency acoustics, and the nasal passages are relatively large. They emit echolocation signals orally, and thus fly with their mouths open for navigation. They can identify a metal strip 1 centimetre (0.39 in) wide at a distance of 50 centimetres (20 in), which is moderate compared to other bats.

Read more about this topic:  Common Vampire Bat

Other articles related to "description, physical, physical description":

File Allocation Table - Technical Design - Boot Sector - BIOS Parameter Block
... at 0x018 to 0x01B are used since DOS 3.0) Sector Offset BPB Offset Length (bytes) Description 0x00B 0x00 2 Bytes per logical sector in powers of two the most ... logical sector size is often identical to a disk's physical sector size, but can be larger or smaller in some scenarios ... up to 32 KB and INT 13h implementations supporting physical sectors up to 1024 bytes/sector ...
L'Encobert - Origin Stories - Physical Description
... The main physical description of The Hidden is from Martín Viciana, a biographer admittedly unfavorable to The Hidden ... was as a secret Jew in his account, as his description contrasts with the normal stereotype of a Sephardic Jew ... Nalle believes that this description was an intentionally unflattering one, in contrast with a prophesied savior that The Hidden had successfully presented himself as ...

Famous quotes containing the words description and/or physical:

    God damnit, why must all those journalists be such sticklers for detail? Why, they’d hold you to an accurate description of the first time you ever made love, expecting you to remember the color of the room and the shape of the windows.
    Lyndon Baines Johnson (1908–1973)

    My vocabulary dwells deep in my mind and needs paper to wriggle out into the physical zone. Spontaneous eloquence seems to me a miracle. I have rewritten—often several times—every word I have ever published. My pencils outlast their erasers.
    Vladimir Nabokov (1899–1977)