Really fine shot. You might consider taming the bright grass by the feet. Well done!
Great capture at a great moment. You should have a read of kencameron's post regarding "beautiful" images overdone, though. (http://www.luminous-landscape.com/forum/index.php?topic=80552.0) The blues are just too intense, even if it is a Great Blue Heron. There's beauty in subtlety.
I agree with Terry. It's a fine shot, but I've never seen a Great Blue Heron whose blue was as saturated as that. I feel if you backed off a bit, it would be excellent.