P. De Benedictis 1965 Calidris pusillus 7 July Barrow, Alaska - number at any of the nests. There was a lone, extra bird (♀) between Nests 16+5, and extra ♂ between 4+5 and 15 and 12. Additional a flock of 9 flew in from Fresh Lake directly over Nest 5 (receiving no challenge) and landed in the uncropped area between Baird Posts 1 and 6; and at least 4 birds were present with 20 feet of Nests 15; one of these birds was challenged by a member of the pair (given a double wing-swing-up) but after this they were tolerated. This group plus a group of 3 seen in the weasel tracks going to the USGS shack were in company with 4 Pectorals. Two displays were heard and 3♂s were seen around nests 12+15 but otherwise they were fairly quiet. When nesting birds are flushed they often give a, slump, rough "tscherk" or "tscherek." When I disturbed the ♂ off nest 15 a jaeger which was attacking me saw her in the distraction display and flew down & tried to catch her; that particular would get up and fly only far enough to avoid the jaeger. The situation is but less complicated in the North Anna. I checked all the nests; saw no birds at Nest 2, one at Nests 1, 7, 9, 17 and 20, all of which were believed to be ♂s, and single ♂ (by song) at nests 10 and 18. Pairs were noted at 8 and 19, but at least they were only loosely associated. Additionally a group of 3♂s and a ♀ was seen between Nest 7-8 and 18, and a ♂ was seen west of Nest 7 across the weasel tracks. The bird on Nest 9 flew in to the nest from the head of the small streamlet near that nest. The ♂ at nest 19 displayed frequently