The duck pictures remind me of a duck that has taken up residence in the tank in our yard, it has gotten used to us goin out to throw in bread for him, or her. Just splashes and quacks closer to shore to us!
We have a convience store in town next to a pond, a guy that works in the store started feeding some ducks on the pond every day. It got so if he was late feeding them the ducks would come to the door of the store and rap on the glass with their bills. here's a Harrier