Great Blue Herons can be bold when they are hungry. The heron nesting tree is right across the water in Alton Baker Park, and this heron could have been born there. That gave it a chance to see the fishermen below and the fish they catch. Wildlife creatures are smarter than we give them credit for. If the fisherman happens to catch a fish, the heron will quickly dive in to grab it before the guy can pull it in. I have seen them do that at times. They don't often win, but the sympathetic fishermen sometimes throw them a fish. So they associate a person fishing with a possible handout. Pretty clever, I say. :)