One of the cool things about these wildlife cams is that we get so see things that one would normally never see. Great Horned Owls will often nest among Heron rookeries, and it is known that Great Horned Owls will prey upon Great Blue Herons so lots of people wondered how they get along? AT least in this case, not so well.
Cornell set up a cam earlier in the spring of 2012 to watch a great blue heron nest, little did the know what they would document! There are 2 attacks in this one video, plus another attack (you can search youtube for it) a day or 2 later. I don’t think this owl is nesting among the herons? But very intense and interesting to say the least! It is interesting to note that the owl attacks the head/neck area in both instances, yet the GBH switched sides.