Dead carcasses in the river bring out the scavengers.
The seagull found the carcass submerged and waited patiently for the tide to go out so he could get to it.
Then the heron came. The seagull gives him room but he doesn’t like it.
It was interesting to watch the back and forth of the heron and seagull. Another gull came in before it was all over. He found a piece submerged and tried to drag it to the island while the heron wasn’t looking. When he lost it, he bobbed for it and the splashing sound caught the heron’s attention. The gulls paddled away when the heron came closer to investigate.
The heron wouldn’t bother with the carcass that was submerged but if it was on land he’d eat it.