For many of us, isolation is disconcerting and challenging, but for wildlife sound recordist Chris Watson, it is something he actively seeks, so he can fully immerse himself in a place and capture its unique sounds in his recordings.

In the second of five illustrated essays, Chris recalls an exhausting and chilling climb to the pinnacle of Skellig Michael, an isolated rock which rises over 700ft out of the Atlantic Ocean off the south west coast of Ireland to capture the wailing cries of the inhabitants which return here at night under the cover of darkness.

Produced by Sarah Blunt for BBC Audio in Bristol.