Green Herons often stand motionless for a long period of time. In this behavior they remind me of sentries, but I caught this one moving a bit. In the second image you can see a bit of the raised top knot.
wonderful pics I have never seen the top knot before
It is a juvenile black crowned night heron. Doesn't look at all like the mature version. Had me confused for many years since none of my bird books showed the juvenile version!