As huge flocks of wildfowl fly south from summer breeding grounds to escape the Arctic winter,
Simon King reports on the mass arrival of swans in East Angliawhile
Chris Packham watches 60,000 snow geese and cranes descend on New Mexico, USA. Continues at 3.45pm.
See today's choices. QUESTION LINE: [number removed] (calls cost 50p per minute daytime rate. 45p per minute at all other times). Internet: http://www.bbc.co. uk/heading_south/home. htm E-mail: heading.south@bbc.co.uk
* Call of the south: page 38