In Greek mythology stork is a bird of Hera, goddess who protected breastfeeding mothers.
In Christian symbolism storks are also good creatures (symbols of Christ) because they destroy snakes, thus they are anti-satanic animals and enemies of evil. It stands for the symbol of the Annunciation to Mary that she would bear a Christ child.
It was believed that storks were very devoted to their parents and they fed them as their children.
White stork is a national bird in Lithuania, Poland and Belarus. Stork eating snake is a symbol of the Hague, Netherlands. It is also an iconic emblem of Alsace, France.