Look around at the intersection of Route 1 and MD 410 (east-west highway). It was at the southeast corner near Beale Circle. I was surprised it was there, because that's more than 1/2 mile from the nearest waterways, the northeast and northwest branches of the Anacostia. That may be a better place to go looking, along the parks (which are nice). But yesterday it was a swamp everywhere in that neck of the woods during the rainstorm. After looking at better pics on my computer, it was definitely a yellow-crowned night heron. The legs gave it away. I have better vision than my phone zoom, which is not good at 200 feet away.