S532 * Sand Martin or Bank Swallow or Collared Sand Martin or Common Sand Martin * Europese Oewerswael * Riparia Riparia

By Riparia_riparia_-Markinch,_Fife,_Scotland_-flying-8.jpg: Nigel Wedge from Fife https://commons.wikimedia.org/w/index.php?curid=16507846

Swael

Sources:
(*) https://en.wikipedia.org/wiki/Sand_martin
(*) https://ebird.org/species/banswa
(*) https://search.macaulaylibrary.org/catalog?taxonCode=y00808