It is a very fast and active bird, often seen chasing anchoita, and sinking his head under the surface. Often dives to capture prey that swallows on the surface. Its agility allows him to avoid larger birds with which it competes. As a paradox, often leads to surface, baits without remove the hook which are accessible to larger birds that swallow whole and drown. Usually follow the fishing boats to feed on its waste.
Flight strong, fairly stiff wing beats interspersed with glides on bowed wings.