A seasonal offering from Tweet of the Day for the Christmas period.
Martin Hughes-Games presents the bar-tailed godwit.
Felicity Finch joins conservationist Tim Dixon in search of the very rare Barbestelle bats
Liz Bonnin presents the black-footed albatross of Midway Atoll in the Pacific Ocean.
Martin Hughes-Games presents the black-tailed godwit.
Banning Eyre visits Misiones province in Argentina to learn about chamame music.
Lionel Kelleway visits the Arne RSPB reserve in Dorset to see the rare Dartford warbler.
David Attenborough presents the sounds and story of the Dartford warbler.
Wildlife cameraman Doug Allan recalls hearing an emperor penguin chick for the first time.
Sir David Attenborough presents the emperor penguin from the Antarctic Peninsula.
Brett Westwood encounters the large blue butterfly on the Somerset Downs.
Chris Sperring visits a meadow visited by 2,000 black-tailed godwits in winter. From 2013.
Chris Packham presents the greater rhea roaming the South American pampas.
Chris Packham presents the superbly camouflaged great snipe of Eastern Europe.
Michael Palin presents the Harpy Eagle flying over the Brazilian rainforest
Chris Packham presents the ivory gull from the northern polar seas.
James Aldred encounters one of the world's most powerful birds of prey, the harpy eagle.
Lionel Kelleway travels to the Falkland Islands in pursuit of Johnny Rook, the cara cara.
Audio-visual artist Kathy Hinde is entranced by "an apparition" of knot.
David Attenborough presents the knot.
Nature writer Mark Cocker revels in the windblown melancholy of the meadow pipit's song.
Brett Westwood presents the story and sound of the meadow pipit.
Kate Humble presents the meadow pipit.
Chris Packham presents the North Island kokako from New Zealand.
Iolo Williams watches meadow pipits as they attempt to fend off a cuckoo from their nest.
Jessica Holm searches for otters along the Tarka Trail in Devon. Recorded in 1993.
Paul Brook on the redwing which ignited his love of birdwatching for Tweet of the Day.
Miranda Krestovnikoff presents the story and sound of the razorbill.
Wildlife sound recordist Chris Watson presents the red-legged partridge.
Wildlife sound recordist Chris Watson presents the redwing.