Dude these fucking birds are smart! I'm from Florida and I've had them walk right up and steal fish right out of my bucket when I wasn't looking. They are slick like that.

Now If I'm ever fishing and a Great Blue Heron approaches I throw him the next Pin Fish that I catch to make him go away. Throw them a fish and they will fly off with it. Usually anyways. If you are lucky it won't come back and try bumming more off of you HA HA. This same technique will work for Pelicans too.