Maclean 1968 Calioris bairdii 2 June the first sighting at Barrow: Saw 2 ♂♀ chasing each other about behind Browerville. the tundra there was only slightly exposed - a few islands of high- center polygons. Watched the birds do a little feed up there. 4 June Saw 1 bira on small exposed mounds near aacs. 5 June at least 1 pair was by the west end of trapline IX. 7 June Still there, but not many others. 9 June Ditto. 11 June there has definitely been a major influx. Birds are quite noisy over raised areas. I am again impressed that Bairdii can entertain themselves on much smaller patches of exposed ground than the other Calioritines. Interesting - this, one would think, would enable them to arrive early, yet they arrive late. Perhaps both points - late arrival and association with small patches of exposed ground - relate to exclusion by other birds. the matter of territory utilization, both within and between the species, remains to be worked out. 13 June Again - many birds heard displaying, but spread over the whole area, not in aggregations as often appears. Not much in