B
IRDS
The storks that we contemplate in the reserve of the Natural Park of the Aiguamolls de l'Empordà star in endless processions on this sunny day. Oblivious to the observers and their binoculars, the birds are excited in their nests and boisterous in their acrobatic flights in pairs, so synchronized that they look like an aeronautical exhibition.
information rescued from https://phys.org/news/2016-01-white-storks-migration-patterns-due.html