This sand martin colony with 30 nesting holes was spotted on the edge of one of our wildlife reserves. Luckily the reserve provides lots of food for the hungry chicks! #sandmartins #sanddunes #cornwallbirds #cornwallwildlife #naturereserve #cornwall | Cornwall Wildlife Trust

Sand Martins are one of the earliest summer visitors to arrive in the UK, often being seen during the first two weeks of March. It is also one of the earliest species to go again, with most leaving for wintering locations south of the Sahara in early September. Find out more about the lifecycle of Sand Martins at the species' new BirdFacts page 👉 https://www.bto.org/understanding-birds/birdfacts/sand-martin 🎵 Sand Martin flight call by Andrew Harrop / Xeno Canto 📷 Sand Martin in flight by Liz

This cinematic clip captures a concise and revealing example of the Sand Martin call — quick, bright contact chips and soft chatter captured at riverbank level in ultra-clear 4K. In the field sequence you'll see a close pass and hear rapid short bursts of contact notes that punctuate the flight and perching behavior; each note is accompanied by a subtle throat and brief body shiver that gives the call its character. We recorded this sequence to highlight the acoustic signature of this Sand Marti