This is my pencil drawing of Leda and Zeus as a swan, a drawing I’ve made yesterday
Zeus became a swan to be with Leda, the daughter of the king Testios of Etolia. Zeus and Leda had 4 children who came out of the swan’s eggs : the twins Castor and Pollux, Clytimenstra and Elena.
Some say the swan was a male but the legend says this swan could make eggs. How can a male swan make eggs?
Maybe the ancient Greeks knew that in birds the females have the XY sex chromosomes, while males have XX. In this legend Zeus was the mother and Leda was the father, so the roles were reverted.