This is one of those shots where if you use a greater focal length either by teleconverter or lens you could get the BG to blur out a lot nicer and thereby give you more separation between it and the birds, which would then give them a whole lot more power. Or use f/4 but I'm not sure how much effect that would yield. Did you crop this? And where was it taken?
Some nice action Stuart and lovely lighting on the GBH's neck but it does appear to have a slight blue cast on my monitor. IMO I probably would exclude the second heron if you were not able to capture all of it and just have an image of the one GBH coming in with a stick. Many thanks for sharing.