- Anonymous1 decade agoFavorite Answer
Actually there are some bats who really do use their eyes. Some species of bats have very large and round eyes to be able to see in the dark while their ears are smaller than the size of their heads. Thus this adaptation shows they use their eyes rather than their ears like other bats.
Other bats that you say are blind use another source of "sight" called echolocation. This is like the sonar of a dolphin or submarine to detect other things in the water only this form is on dry land. Bats emit a loud sound (or that little squeak you hear all the time when they fly around you) and when those sound waves bounces off of an object and comes back to the bat, it can know the location of obstacles or insects. Bats can use the echo that bounces off and use that to obtain information about that object or insect, like what size it was, how it moves, all that good information and they use that to their advantage whenever they're obtaining food or dodging trees and light poles. But while vision is not important to the bats during the night, hence the large ears but small eyes, the bats really can see so they're not really blind as people think.
- SharonLv 44 years ago
No, bats are not blind. The expression blind as a bat comes from observation made deep in caves where bats roost. Deep inside caves there is no light whatsoever. No moonlight, no star light, just absolute darkness. In there nothing with eyes can see. The bats squeak and use echolocation to find their food, insects and the like. These observations are what led to the expression as blind as a bat but it may have been truncated from as blind as a bat in a cave, they love caves, as that was too long to say.
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- 1 decade ago
To explain it clearly...bats are not blind...they can see. But their vision are limited. That is why they use their echo location. They can make a picture inside their brain when the sound waves they send reflects back to them and thus creates a picture of the surroundings. This happens so quickly. They can guide themselves inside a room criss-cross with wires without touching the wires....I love bats...I study about them...Go forth...protect them...
- 6 years ago
high-pitched ultrasonic squeaks of the bat
are reflected from the obstacles or prey and
returned to bat’s ear, as shown in Fig. 12.18.
The nature of reflections tells the bat where
the obstacle or prey is and what it is like.
Porpoises also use ultrasound for navigation
and location of food in the dark.Source(s): The high-pitched ultrasonic squeaks of the bat are reflected from the obstacles or prey and returned to bat’s ear, as shown in Fig. 12.18. The nature of reflections tells the bat where the obstacle or prey is and what it is like. Porpoises also use ultrasound for navigation and location of food in the dark.
- Anonymous1 decade ago
I think its called ultra sound (thats what I heard). they keep 'singing' this sound and the sounds deflects from objects and they hear where objects are, so they dont fly into them.
hm I also need to look about bats.
- curious connieLv 71 decade ago
They are not blind, they just have poor eyesight. They also have a form of build in radar.