In case you need the details again :
Greater Horeshoe Bats in Buckfastleigh :
http://oi44.tinypic.com/5ciq0k.jpg
Here's a map of the Buckfastleigh area - you need to park by the "chapel rems of" at the end of the yellow road near the centre of the map. Then walk along the path which sets off roughly northwards from the parking area.
Get there about 15 minutes before dusk on a warm summer evening, walk down the track about 50 yards and wait quietly. You don't need a detector - these things are the size of soup plates and flying up the 'green tunnel' are very impressive. One of the most amazing wildlife experiences I've ever had in the UK.
dave xx