It's a hot midsummer day and sunlight sparkles along a stretch of gentle rapids on the River Usk. On the riverbank, floods have carved small cliffs enticing a colony of sand martins to create a stronghold. The birds sally forth to hunt insects – chattering as they go. BBC Countryfile Magazine's Sound Escapes are a weekly audio postcard from the countryside to help you relax and transport you somewhere beautiful, wherever you happen to be. Recorded by Fergus Collins, introduced by Hannah Tribe. Email the Plodcast team – and send your sound recordings of the countryside – to: [email protected] Learn more about your ad choices. Visit podcastchoices.com/adchoices