Scotland's ospreys have started their epic autumn migration to West Africa. A team of conservationists headed up by biologist Sacha Dench is following them all the way, aiming to discover much more about the journey that the ospreys make and the challenges they face along the way. Climate change is making weather patterns less predictable, crucial wetlands on their route are being poisoned by pesticides and depleted by drought and the birds have the unfortunate habit of electrocuting themselves when they land on powerlines with freshly caught fish.

Today, the Conservation Without Borders team follow the birds through the mountains and wetlands of Spain to the shores of the Mediterranean.

Producers: Emily Knight and Alasdair Cross Show less