Are bats really blind?
Most people think bats are blind, perhaps because many fly at night. All bats, whether they fly during the the night or day, have excellent eyesight.
How do night-flying bats find their way in the dark. They send out high-pitched cries which echo off objects (echo location). The sooner the echo returns to the bat, the closer the object is to the bat. In this way, the bat knows how to avoid crashing into things.
Sunday, July 6, 2008
Bats Are Not Blind
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Bat eyes are generally small, but well adapted to low illumination, having mainly rod-based retinas, large corneal surfaces and lenses, and generally large receptor fields. They can easily detect small differences in brightness on clear nights, and the visual acuity remains relatively good in dim illuminations.
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