Calidris pusillus Barrow Alaska June 20 About 15 pair were observed scattered around th. tundra. This, birds appear to be found in little packets 2-) pairs per pocket. Territorial disputes are observed among th. birds of a pocket. These disputes usually consist of chasing with trilling heard while the birds are in the air. Once a bird of a pair was seen with his head cocked. He was facing a bird perhaps 8yds. away. He walked about 1yd. toward the other bird with tail cocked. It then flew toward the other bird and chased it and its mate. The mate of the first bird remained on & fed. Jun. 21 The birds were observed in pairs scattered about the tundra. Much singing and displaying were heard, One pair seems to be well established in the high ground at the N end at the Britton area. June 22. Only two pair of this birds were found on the ground newly exposed that was sheuled today. June 23 Only one bird of the pair at the N end at the Britton Area was observed. Perhaps the other bird was on the nest. Other pairs were observed scattered along the tundra. Some territoriality and displaying were observed. June 24- Aug 3 - Many nits of this species was found and Paul kept track of them. About 4 nits were found where the full clutch was only 3 eggs. The incubation period was 19 days (Jun. 25-July 14) for the ear [illegible] I could determine it. About 20, holt at 74