Holmes,R. 1961 Erolia alpina 4 June Barrow, Alaska were chasing each other, tumbling around, running back and forth - for about 1 min. Finally I flew up onto the snow patch; the other came along behind it with the tail depressed head held high. They both then flew off. Other singles were seen collected (all proved to be RBD). This period seems to be right in the middle of courtship activity. Some birds are paired; others are not. Chasing is frequent seen. This may be courtship chasing or territory disputes. 5 June Numerous pairs were seen today along Elson Lagoon + in VMD's area. All birds appeared paired. "Individuals" were observed. No chasing or courtship was noted (one pair was seen chase a neighbour displaying bird). The RB seen numerous + are heard everywhere. Birds were watched feeding today. Most were working the polygon type or grassy areas + not the wet, flooded bands. They would feed by probing shallowly or picking at the surface. No deep probing was noted. The birds move rapidly + do not stay in any one spot for more than a few seconds. 6 June One RBD was watched as he fed. Suddenly he took flight, flying low over the ground