Like any mother would, this bird is vigilantly guarding her nest. I am sure this mother (as all of us) carefully looked around to select the best place for her nest-- the safest place where she can raise her young uninfluenced by the world. I am sure this place seemed like a good idea. Quiet, serene, close to the water . . .
But then the pool opened for the summer! (Can you see her next to the tree???)