Great Falls of the Potomac National Park is located near McLean Virginia. I visit it whenever my wife and I visit Washington. It maybe a small park but I have had excellent luck photographing birds here. The falls are only about 23 meters (76 feet) in height but they are impressive none-the-less.
In early May I arrived to find great blue herons fishing the river. Apparently the shad were running and I did see one heron catch (and release) a shad. The fish can weigh up to 3 kilograms (abut 6 pounds). That is a lot of fish for a great blue heron! They weigh only a couple of kilograms.
Most of the fish in the video are, I believe, suckers.
Funny thing; the first day there the fishing was very good and I saw many fish caught. The next day nary a one was! Even so the herons were still there trying.