Upside Down Swan ???

On March 21st I blipped this swan building her nest.  Now she has completed it and is sitting on it.  No idea if there are any eggs as she didn't move off the nest. The water is quite high in the pool so her nest is now on an island.  Across the road at the other pool a canada goose was sitting on her nest.  Couldn't get close enough to take a decent shot as her mate was guarding her really well, and if he thought you were coming anywhere near he ran at you hissing.  I have put the best shot I could manage in extras.  T was braver than me and went closer, he said he could see one egg as she stood up and moved position