We spotted these two blue-and-white swallows as we were trying to identify other passerines which were moving restlessly. The head movements showed that was a courtship display and we focused on them. The head movements were quick, short, lineal and in all directions. An incessant asymmetrical dialogue between the two partners. At a certain time the male climbed on the female to mate. Then a short conversation followed and another mating took place. Then they flew off.