Filmed and introduced by Dick Bagnall-Oakeley.
The winter months are a particularly good time in which to begin learning bird identification. Today's programme shows a simple method of sketching birds to help in taking notes in the field.
Many land birds change their diets in winter and some, like the robin, take up special territories. In some winters Britain is invaded by numbers of an attractive berry-eating bird-the wax-wing.
(to 11.45)