Bat sounds in a hibernation site

As mentioned earlier we put an SMTĀ  detector into one of the hibernation sites at Whipsnade

This is a recording of a Natterer’s Bat flying around inside the hibernaculum You can see the echolocation calls bouncing off the walls


But there were also some social calls

This one if slowed down by a factor of ten makes a screaming sound that wouldn’t go amiss in a horror film

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