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A look at animal migration in a changing world. In Mexico, millions of Monarch butterflies pour into the trees for the winter.
A look at animal migration in a changing world. This week the cuckoo migration from Africa to Europe.
Animal Migration in a Climate of Change
Episode 3
Duration: 26 minutes
First broadcast: on BBC World Service OnlineLatest broadcast: on BBC World Service Online
Available for over a year
A look at animal migration in a changing world. Part 3: African elephants' migration in South Africa.
A look at animal migration in a changing world. Wild geese make some of the most arduous journeys of any animal.