Jim, really nice water lilies. Mine are in a more shaded location and they seem to be quite transient. They bloom and then there're gone. There were some there a couple of days ago but today, nada.
Do you leave the lilies in the pond over the winter?
Karen, when I put in my pond the raccoon telegraph system worked really well and they showed up within days. Since I also have fish in the pond I installed an electric fence module and two perimeter wires, one 3" and one 6" off the ground. I watched from above how the learning curve for raccoons worked. A couple were a little slow and had to zap themselves more than once but after that, no problems for several years now.
Having lots of vegetation in the pond also helps protect the fish from blue herons. A little fish line high overhead also helps.