Brett Westwood explores how bears have influenced art, literature and belief.
Chris Jones rescues and then releases a swift in this Tweet of the Day.
Tom Heap finds out how DNA analysis can help prevent illegal trade in Rhino horn.
The cuckoo has many secrets but has got under our skin. Brett Westwood asks why.
David Attenborough presents the sounds and story of the female cuckoo.
David Attenborough introduces the male cuckoo.
Lionel Kelleway heads to Dartmoor to get close to a juvenile cuckoo and its foster parents
Urban Birder David Lindo on the swift.
Presenter Dermot O'Leary relishes soaring swifts and swallows bobbing in front of his car.
Writer and former Children's Laureate Michael Rosen explores the world of bears.
David Attenborough presents the South American hoatzin.
Musician Jimi Goodwin on his shock at discovering the cuckoo's wicked ways.
Wildlife gardener and writer Kate Bradbury enjoys the swift above her garden in Sussex.
Laura Howard describes how learning about nature turned the countryside into a fascination
Paul Evans goes to Maine to meet a conservation biologist who has spent a life with loons.
Iolo Williams watches meadow pipits as they attempt to fend off a cuckoo from their nest.
Brett Westwood meets a rhinoceros nose to nose and is blown away by the experience.
Grant Sonnex presents the programme from the RSPB's reserve at Minsmere in Suffolk.
Horror novelist and birdwatcher Stephen Gregory returns for a second Tweet of the Day.
David Attenborough presents the sounds and story of the swift.
Chris Packham relives a Living World programme from 2000 about swifts.
The cuckoo has inspired Tara Robinson to create a play about bird migration.
Sarah Angliss uncovers the fascinating story of how we tried to teach the birds to sing.
Will the sale of harvested rhino horn help to stop poaching?
Lionel Kelleway is joined by Michael Woods in search of dormice.
Angela Saini explores the science of birdsong and its relationship to human language.