The two large fish-eating/wading birds in our area are egrets and great blue herons. Both are super wary and spooky, especially the herons. They will fly to the top of the tower, about 30′ above the ground, and check out the pond before descending. They are after the little fish in our pond. When this happens, I sneak into the house and shoot photos through the window that looks out on the pond.
Look at those black legs.