A series of programmes on some of the most extraordinary facets of the animal world; with Tony Soper Migration
The magical mystery tours of many animals span the globe. Swallows fly a distance equivalent to the moon and back during their lifetime, and they will return to the same nest site year after year. What are the advantages of jet-setting? What kind of navigational clues do inter-continental travellers use? TONY SOPER follows our swallows south to see where they spend the winter.
Film editor RON MARTIN
Producer JOHN SPARKS. BBC Bristol