Edited and introduced by James Fisher.

Denzil Harber reviews 'Witherby's Sound Guide to British Birds' by Eric Simms and Myles North, published in collaboration with the BBC.

W. E. Swinton discusses the really early birds-the prehistoric forms-and advances new ideas about them.

Peter Scott visits the Wildfowl Trust at Peakirk in Northamptonshire and describes the decoying of wild ducks and a tour of the collection.

(BBC recording)