Saving Species Series 3, Freshwater Eels and Mitten CrabsEel Surveying in the Ottawa River Valley, Canada

Reporter Sian Griffiths travelled to the Ottawa River Valley to explore the American eel's habitat.

2/4

David Browne of Canadian Wildlife Federation

Surveying the Ottawa River with a makeshift antenna. Image courtesy of Sian Griffiths.

Saving Species—Series 3, Freshwater Eels and Mitten Crabs
22/24Brett Westwood looks at the invasive Chinese mitten crab, plus freshwater eels.
BBC Radio 4