The sky has been full of screaming swifts for months. Where did they go? Find out about the heady heights and swirling sights of swifts in this episode about one of the UK's most spectacular migrating birds. 

 

For info on how to help swifts: 

https://swift-conservation.org/

https://actionforswifts.blogspot.com/ 

 

Main resource: Sarah Gibson's 'Swifts and Us'

 

Swift calls: Uku Paal, XC664459. Accessible at www.xeno-canto.org/664459.