Bat skull. Coloured X-ray of the skull of a bat showing well-developed organs of the inner ear used for echolocation. On either side of the base of this bat skull are large coiled cochlea, the organs of hearing. Many bats use echolocation to navigate when flying at night, and to detect and capture their prey. Echolocation is a series of high-pitched sounds that are emitted by the bat and reflected off the environment to determine the position of objects. As seen here, these organs of hearing take up a substantial area of the skull. Bats with this refined sense of echolocation usually also have large external ears. Magnification: x1 at 6x7cm size.
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