try http://www.snh.org.uk/publications/o...e/identify.asp
I remember a few years ago when we were on our annual holiday to Eillean Shona (a must place to visit) and one night, whilst admiring sunset I saw bird like shapes appear.
At first I thought they were young starlings, but the absence of adults made me think again. I checked the visitors book but no one else had logged these birds so the following night I sat outside cottage and waited.
My wait was fruitful as as dusk descended I was rewarded with the sight of hundreds of pipistrelle bats emerging from the roof of cottage.
I have never heard of a "bat detector", I thought it was the type of device that less than salubrious nightclubs would have on the door to deter thugs.
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