Sounds of Bats
Hear the sounds of a Myotis auriculus and a Lasiurus borelis recorded in Arizona, USA.
All the calls on this page were recorded with a Petterson D-980 bat detector and time-expanded by a factor of ten before being dumped to tape on a Sony Professional Walkman. Calls were resampled at 44.1 kHz and 8 bit resolution on a soundcard.
All calls were recorded by Dr. John Altringham.