P. DeBenedictis 1965 Calidris pusilla 4 July Barrow, Alaska - and began sharing the & Baird's which remained in a distraction display. The interactions between Baird's and Semipalmos are more than co-incidental but the territories of the two do overlap at least in part. 5 July I was shown another nest found near line IIIA on the evening of 4 July; it contains 4 eggs according to Wam. It occurs in an area where I thought birds were coming to fend off territory. I now wonder if nests won't eventually be found to accommodate most of the cases noted earlier, as seems to be happening behind the herd. One I saw in the evening got up and went into a long display flight with occasional songs that covered about 3/4 mile, and went over 5 marked nests, from trap line III to the VOTH area. There seem to be fewer of these in Central Marsh now and they were more conspicuous in VOTH though through only through the lack of Western in the area. 6 July a flock of 8 birds in the NE part of Central Marsh were the only ones seen. 7 July Made a complete check of the birds taken from the lab in the morning, which was greatly complicated by the presence of obviously transient individuals. I noted pairs at nests 4,16,15,12,13. Birds which I took to be M due to their short bills and a tendency to sing in drain giving a till were noted at Nests 5 and 14, and birds which I took to be Fs were noted at Nests 3 and 11. There was no change in egg