mjz, these creatures are truly majestic without a doubt. They are impressive creatures--but knowing they are eyeing our ponds as a sushi buffet does certainly make you despise these critters. Try putting fishing line zig-zagged across your pond. Once he sees that he has no access, he'll likely leave your pond alone.
Also, your fake herons might have something to do with attracting him as well. I think it was koiguy who said that the fakes are only good AFTER the mating season, as that's when these birds try to avoid eachother due to territorialism. But you might be attracting the heron at this point thinking its mating time. Dunno. Perhaps koiguy can chime in here and clarify the point. I know that it made sense when he explained it.
Also, your fake herons might have something to do with attracting him as well. I think it was koiguy who said that the fakes are only good AFTER the mating season, as that's when these birds try to avoid eachother due to territorialism. But you might be attracting the heron at this point thinking its mating time. Dunno. Perhaps koiguy can chime in here and clarify the point. I know that it made sense when he explained it.