This is Ciscoe (Drake in pool) and Mildred (one of "Ciscoe's girls"- all of the girls are Ciscoes, they follow him around exclusively - to the chagrin of the other two drakes). They have been standing on opposite sides of the pool wall for over a half and hour now, bobbing their heads frantically at one another. Then they changed places....she in the pool, he outside. Eventually, they both gave up and went off to preen and eat some feed. Just goes to show, even ducks have trouble communicating!