Boo! or True?
you ever heard the saying "as blind as a bat." Don't
believe it !
so you know, these bats aren't wearing glasses. It's just a little
back to the bats...
can see. Some see better than we do.
bats, like flying foxes and fruit bats, have very large eyes that
enable them to see flowers and fruit in the night.
bats, like vampire bats, can see but also rely on their ability
to "see" with their ears using echolocation.
Bats capture insects and navigate in the dark by echolocating.
how it's done:
for insects, a bat sends out a series of squeaking sounds - so
high-pitched that a human being can't hear them. Scanning for
insects, the bat continues to send out pulses of sound, as many
as 500 per second. A bat knows when an insect is near because
the sounds echo, or bounce, off of it.
can catch as many as 3,000 insects in a single night.
Because of their ultrasonic
echolocation, bats have the most acute hearing of any terrestrial
animal. Vampire bats (family Desmodontidae) and fruit bats
(Pteropodidae) can hear frequencies as high as 120-210
kHz, compared with 20 kHz for the adult human limit and 280 kHz
for the common dolphin (Delphinus delphis).
on - Go to Boo! or True? Part Two!
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