>Giles
>
>The *only* way to see a bat is when its flying indoors. Their skill is
>beyond belief. They are of course hunting with radar (yours was probably
>transmitting ultrasound at between 45 and 55Khz - humans can hear upto
>about 19Khz) and can sense something as fine as a human hair in their
>flight path, in total darkness, and avoid it.
>
-snip>
>regards
>
>John.
John,
Radar uses radio waves. Bats don't emit radio waves. Sonar uses sound
waves. Most recent articles on bats I have seen don't use either word
because, technically, neither one is really appropriate. They usually use
"echo-location".
Winsor
Winsor Crosby
Long Beach, California
mailto:wincros@xxxxxxxxxxx
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