[pcottraux]

There are some you can listen to here:

http://www.bfro.net/avevid/SierraSounds/911.asp

Mysterious recordings, cannot be matched with any known species, etc.

I'm a bit of a Bigfoot enthusiast. In college, me and my friends would often go looking for them. Never found one, though.

[Paul_Denton]

Very cool! I used to go looking for them too.