They nest in tree or on cliffs and mate for life. Those birds are capable of 30 different vocalizations. They are a small bird, with predominantly white body and black top of the head and neck and silver gray at the tip of the pointed wings. They are very protective of their nest and attack people who walk to close. They fly with their beak pointed down to look for fish.
Arctic tern have the longest migration known.
Their under part is white except for the collar. They breed in Kodiak Island, Prince William Sound and Cook Inlet and feed on small fish, cephalopods and crustaceans. They are predominantly white with pearl gray mantles and white spotted black wing tips, and yellowish legs and very short unmarked greenish yellow bills. They feed on small surface fish, on intertidal marine life on the mud flat, on garbage dumps, canneries and salmon spawning streams. They do not form very big colonies.