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Some bats have solved this problem using their eyes. These bats (the Megachiroptera) have large eyes that are capable of seeing well even in almost total darkness. Bats are not blind! For example, flying fox bats have very good eyesight and they use their eyes along with their excellent sense of smell to help find food in the dark. Bats' eyes are better at seeing in the dark. Most see objects only in black and white, but color vision is known to exist in some old world fruit bats.

Even the tiny eyes of the echolocating micro bats are sensitive to light. Mega bats are highly visual animals that use their eyes to locate fruit-bearing trees during nocturnal flights. Theses bats are capable of seeing more sharply than humans in the dark, but are not more sensitive. Some micro bats have the ability to discriminate between vertical and horizontal stripes. Observations suggest that when foraging for insects, bats use vision to control their flight altitude. In short, bats have eyes because they use it to locate and find food to eat and to live.

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17y ago

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