Incredible JourneysA BUTTERFLY'S RELAYBBC One Duration: 30 minutesFirst broadcast: Thu 23rd Jan 1997, 20:00 on BBC One CambridgeshireLatest broadcast: Mon 21st Aug 2000, 20:00 on BBC Two EnglandFollows a relay of 3 generations of Monarch Butterfly on their 3000 mile migration across the North American continent from Mexico to Canada.GenresFactualScience & NatureSeriesIncredible Journeys Source: BBC Online