The eider duck, known locally as "Cuddy's" duck, is regarded as the first bird in the world to have been given conservation protection, when St Cuthbert offered the eider duck sanctuary on the Farne Islands in the seventh century. Today, they breed in vast numbers off the Northumbrian coast, and Brett Westwood travels to Amble harbour to see the duck's colourful breeding plumage, and listen to the famous "crooning" calls of the males in the company of the RSPB's Paul Morrison and biologist Hilary Broker-Carey

Since the programme was first broadcast the eider duck has been part of a discussion on Marine Conservation Zones. Wildlife presenter Lindsey Chapman revisits this Living World from 2002 before bringing the story up to date for today's audience.

Producer Andrew Dawes