Swifts and Swallows Clip: Ep 10: Natural Curiosities
Sir David Attenborough talks about the history of swift and swallow migration in Magical Appearances, the tenth episode of the second series of David Attenborough's Natural Curiosities.
Olaus Magnus drew a picture that showed swallows being pulled up in fishing nets, dividing opinion on whether they migrated. Until Edward Jenner weighed in.