Hamilton 1965 Calidris alpina June 12 Barrow Alaska - Two Dunlin were observed feeding stop Beach Ridge. On the W side of Family Lagoon about 50 birds were seen. Some of these birds were paired and were observed in flight display and trilling songs. The majority were seen in flocks, however. One flock that was observed had about 30 birds in it. June 13. In the area covered the number of Dunlin seemed to have increased. Several large flocks were again seen. Some birds seemed to have been paired. June 14 Three Dunlin were seen feeding in the area in which I started my walk. As I walked I saw one Dunlin flying. Later 2 Dunlin were seen with one chasing the other. The flight was stylized with stiff wings. One of the birds gave a trilling note several times - I could not tell which one. These birds were flying N. June 15. Several birds were heard seen feeding in the North area. All the birds seen were paired. An airial display with the long-call given was heard several times. When this is done the bird hovers at one spot about 50 ft. above the ground. The wing beats are stiff and the wings do not seem to rise above the horizontal. Once a bird was seen to give this display and then to move about 200 yds. away and give it again. This suggests that it may serve to mark territorial boundaries.