At the dock, the seagull is looking for food. Flying gracefully in the air, keenly searching for prey on the sea; (a seagull is hovering gently, with its eyes fixed on the water; one walking near the dock, looking down for food residues that may be washed ashore). The whole scene is full of vitality and vitality, and the seagulls by the dock show their elegant and dexterous predatory skills.