P.D.Benedict's 1965 Xenia sabini 12 July Barrow, Alaska - two seen flying west along the lead in the evening. 25 July Two colonies located, one of 12-15 pairs and the other of 2-4 pairs. The smaller colony was about 1mi W of the old gas well near Sungivoach and the larger, about 1½ miles N of there. Both were in wet grass lake with marshes, water 2 to 8+ inches depth, where drumworks of peat provided nest sites. The nests were grass lined cups, and appeared to have huddled as 1 young was found in one cup and 2 chicks that may have been this species were found on another mound; no other chicks seen but several egg shells noted. Both colonies associated with 2-3 pair of Arctic Terns. They drove away any gullies that came near the colony, 6-8 gulls taking part. They flew about over head while we were in the colony, occasionally diving directly at us when we got near nests or chicks and would sit on nests when we were about 35 yards away; the whole colony was about 400-100 feet and the nests widely spaced, many on Islands in the lakes. Birds landed in the later and were often attacked by member of another pair. In addition to the tern-like call they gave a series of stark rough "kat" notes ---- when alarmed. In the brief time I watched them I noted a upright posture with bill somewhat below horizontal, head tossing following a definite forward and a forward also seen from the water.