Additional Use for Olympus LS-10, Bats?

["tk7859" tk7859]

Hi all

This evening I noticed bats flying in the garden for the first time this year.  
I thought I would have a go at recording them with the LS-10 that was to hand.

Using the built in mics and 24/96 I got the following typical spectrogram using 
Audacity.

http://farm4.static.flickr.com/3315/3474514282_c66705f91b_m.jpg

Looking a bit more closely at it in Raven Lite I see most of the calls occupy 
44 to 48 kHz.  There also seem to be some a little lower at 40 to 42 kHz.

I definately saw the bats so I'm sure the LS-10 recorded them.

Must try some other microphone/recorder combinations.  Also need to bone up on 
spectrogram (or should that be sonogram) viewing and analysis.  Maybe a cheap 
heterodyne bat detector is in order:-)

I seems the little Olympus is more versatile than I thought.  It should also be 
capable of getting reasonable recordings of grasshoppers, crickets and other 
insects.

Cheers
TomR