We join explorer Roland Arnison on a kayaking expedition to the outer Hebrides on a quest to record the call of the storm petrel. These small and elusive seabirds spend most of their time at sea, nesting on rocky isles around the western coasts of the UK. While camping on the coastline of a remote uninhabited island, Roland patiently waited through the night until he heard the digital trill of the 'stormy' ring out in the dark.

This programme features audio recorded by Roland Arnison, and it was produced by Sophie Anton for BBC Audio Production in Bristol.