I have always thought the stabbing large fish behavior was very strange.
Are the heron "bird brains" so stupid that they just see a silvery flash in the water and attack? If it is a 4" fish, they eat it, and if it is a large fish it is just unfortunate to be around a hunting heron and dies?
Or are the herons so smart, that killing large fish in the pond allows them more small fish for their consumption?
I have only observed herons hunting from across the pond. I have never seen game camera video that shows their actual hunting techniques at close range.