My Goodness, it's an egg!
We have no hopes for future ducklings, and are not sure if it was Agnes or the other female that laid the egg, but there is no nest and no one seems to be concerned about the egg. It's just sitting there. Later in the afternoon Agnes was hanging out on the island, completely ignoring the egg.
In other duck news, I acutally saw Agnes walk up the ramp. Here I was thinking we were silly for having it there, but she swam around to the side with the ramp and waddled on up.
They have taught us well, we keep them fed. I had to go out yesterday and re-stock the cracked corn.