In 2024 and 2025 expedition leader and film-maker Roland Arnison kayaked along the west coast and isles of Scotland to find and record the sounds of seabird species. His quest took him 40 miles out into the Atlantic to St Kilda in search of the Leach's petrel, one of Britain's rarest birds that only nests on a handful of offshore rocky islands. We join Roland scrambling up a cliff at midnight to hear the extraordinary call of this nocturnal bird.

Presented by Roland Arnison and produced by Sophie Anton for BBC Audio in Bristol

This programme features audio recorded on St Kilda by Roland Arnison.