This is a small tern most often seen along the coast flying along the beaches or hovering and diving over a school of fish just offshore. Breeding-plumage adults have sharp black caps, reddish bills, and forked tails, and are pale grayish above and white to pale gray below.
They are a common to abundant spring and fall transient over the ocean, usually within 15 miles, irregularly along the coast and in the estuaries. Nearshore and inland flocks are often observed resting in compact flocks on nearby shores or on floating objects, or flying about over the water in search of fish.