Mostly Barn Swallows (Hirundo rustica, german: Rauchschwalbe, french: Hirondelle rustique), with one Brown-chested Martin (Progne tapera, french: Hirondelle tapère), second from right with white throat. (787k)
Here are the pictures of Brown-chested Martin (Progne tapera) with links to the pages on which they appear, links to the full sized picture, and the description of the picture with links to the entry in iNaturalist (inaturalist.org)
All pictures are © Dr. Günther Eichhorn, unless otherwise noted.
Colombia Birds
Dr. Günther Eichhorn Travel Website
Soaring website