Yeah, they've been working on the "in-ground pool" for a while.
At this point I might just dig out that hole the rest of the way and sink the pond-liner there.
I always love to see your ducks fly! They're so graceful! Mine try all the time, but they're kind of chubby, and they usually don't bother to get a running start. They just hop, flap like crazy, and hope for the best! One of them, Mirage (the medium brown, possibly Mallard-colored one) might actually be successful one day, since she practices every day.