I knew right away what I was seeing because I have seen this a few times before. This is a Little Blue Heron that is also a little white because it is in the molting phase of becoming a much darker blue.
Check out my blog post from 2011 that has many more photos of this interesting bird, especially images of a very young one with all white feathers.
This Heron is also distinctive with a bill that is so dark at the tip.
I walked around the small pond to take different pictures. It flew from one side to the other a few times.