Urban animals in all BBC programmes
Rower and Olympic gold medallist Alex Gregory on the house sparrow for Tweet of the Day.
Sir David Attenborough presents the Australian magpie.
Miranda Krestovnikoff presents the black drongo of Southern Asia.
Martin Hughes-Games presents the black-headed gull.
Chris Packham presents the North American blue jay.
David Attenborough presents the collared dove.
London chef and restaurant owner Cyrus Todiwala on his love of the city's house sparrow.
At the beginning of Armistice week, Derek Niemann recalls sparrows on the Western Front.
Gabi Mann on the American crow for Tweet of the Day.
Steve Backshall presents the story and sound of the herring gull.
Miranda Krestovnikoff presents the house crow, native of southern Asia.
Michaela Strachan presents the story and sound of the house sparrow.
A Halloween special: artist Jeremy Deller encounters a Mexican free-tailed bat colony.
Musician Jimi Goodwin on the mallard in this Tweet of the Day.
Wildlife photographer John MacPherson recalls the herring gull for Tweet of the Day.
Wildlife gardener and writer Kate Bradbury loves sparrows in this Tweet of the Day.
Steve Backshall presents the story and sound of the lesser black-backed gull.
Chris Packham presents the mallard.
Nature writer Melissa Harrison presents the case for the humble and rather noisy 'spadger'
Wildlife sound recordist Chris Watson presents the mourning dove.
Nadia Archer of the RSPB recalls Manchester's peregrines for Tweet of the Day.
Bill Oddie presents the peregrine.
Gull scientist Peter Rock on the lesser black backed gull for Tweet of the Day.
Gull researcher Peter Rock on the Lesser Black Backed Gull for Tweet of the Day.
Avian vet Richard Jones introduces the bird that inspired his career.
Actor Sam West laments how the beautiful collared dove has a call like a bored footie fan.
Martin Hughes-Games presents the Tree Sparrow.
Chris Packham presents the wild turkey.
Birdwatching's irreverent Tweeter YOLOBirder tells how he became hooked on peregrines.