The aerial confrontations of Black Skimmers begin on the ground for a reason known only to the skimmers. Maybe over territory, or a mate, or dominance, or something else entirely. It quickly escalates to an all-out aerial chase with the aggressor in hot pursuit nipping at tail feathers or wingtips if the opportunity presents itself as they race across the sky. In this case, the fleeing skimmer turned to confront the aggressor and the chase reversed. And then almost as quickly as it started, it's over, and both skimmers settle back in the colony to go about their business. It's all a part of being a skimmer and I'm thrilled to be a spectator.