Swifts and Swallows Clip: Ep 10: Natural Curiosities

Duration: 02:04

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.

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