For professor of philosophy and music at the New Jersey Institute of Technology David Rothenberg, the blackbird is a beautiful melodic songster which helps explains the difference between bird song and bird call in this Tweet of the Day.

Tweet of the Day has captivated the Radio 4 audience with its daily 90 seconds of birdsong. In this latest series of Tweet of the Day, we bring to the airwaves the conversational voices of those who listen to and are inspired by birds. Building on the previous series, a more informal approach to learning alongside a renewed emphasis on encounter with nature and reflection in our relationship with the natural world.

Producer: Tim Dee
Photograph: Tim Gardner.