There's nothing quite like catching something out of the corner of your eye, spotting a Great Blue Heron flying in low and then it suddenly landing on top of an old fir tree.
It wasn't there long but probably just long enough for the heron to take in the surrounding wetland from a "bird's eye view", making a decision as to where to fish and then flying onto its destination.
And once it has landed in among the dense bulrushes, the heron can fish undisturbed without being seen. It may, however, have somewhat like company. Black-Crowned Night Herons have been spotted heading in the same general vicinity.