The egret had just snagged the dragonfly right out of the air! Now he need to figure out how to swallow it without it flying away.
I think the egret is just starting to develop its green breeding plumage.
This is about a 7.6x crop (based on diagonal) from the original frull-frame photo using a monopod. With a 500mm lens, this is about 3800mm equivalent focal length. The Canon EOS-R with 500mm f/4 IS ii has amazing resolution.