Sam Smith investigates the deaths of thousands of sea birds off the Devon and Cornwall coasts earlier this year. And naturalist Nick Baker goes cuckoo hunting on Dartmoor to find out why the classic summer bird is in decline.
Cuckoo's dramatic decline tackled
In the last 25 years England has lost over half its breeding cuckoos whilst in the south Devon lowlands, one of the bird's key breeding areas, numbers have dropped by as much as 80%.
On Dartmoor the British Trust for Ornithology is working with the National Park to satellite tag cuckoos to shed new light on what is going wrong.
Watch the video feature on the BBC News website.