Bats eyes are very functional. Bats'
retinas have an abundance of rods (a prerequisite for night
vision) and also two types of cones: the ordinary, that serves
them well in daylight conditions, and UV-sensitive that gives them
night vision. Bats use, but do not depend exclusively on their
sonar. Some bats can see better than others, but none are
blind. Some varieties of bats can see color and others can
only see black and white.
Bats groom themselves by meticulously licking and scratching
themselves and each other for hours. Bats are the only
mammals that can fly. An average bat lives about thirty years.
Out of the 900 species of bats, there are only three vampire bats
in the entire world and they are generally found in South America.
The remaining species of bats over the world feed off of fruit,
nectar, pollen, and insects.
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