I hate to be the coli poster that points this out, but i think the heron was trying to eat the booty.
At first it looked like the goose was dragging the heron, but if you look closer you can see the heron nibbling on his backside. Looks like goosreh was trying to get him off.
After goosreh knocked the booty bandit off the first time, The goose tried to square up for a fair one , but Heron went back immediately for seconds
