JPlayers 1978 Calidris pusilla AtKasook on the Meade River, North Slope Borough, Alaska 29 May Deer the 15th pup of 1978 is a pusilla, mudded down between tussocks by the end of the airstrip. It responded to my approach by giving an alarm call, suggesting it may be localized already. There were no pups at this spot until this a.m. Throughout the rest of the day I continued to see pusilla on any number of bare spots between camp and transect 11. Small flocks of pups also flew by. Very little display activity, although I did hear the beginning of a motorboat call. 30 May pusilla conspicuously absent today. By 1630 I have seen none, nor heard any. 1730 & suddenly appeared singing on runway. At 1830 I walked to Atkasook (see journal) found 10-15 pusilla by town, including a small number (4) displaying in the air and chasing. 31 May pusilla still not conspicuous by camp. Display activity continues near town Barrow, N. Slope Borough, Alaska. pusilla scattered in flocks along roads where snow has melted. At least 258 chasing, on Grid 1, briefly around #2100. 1 June no display activity. None away from roads 2 June pusilla seen only by roads. One displaying briefly at POW WHITE 3 June same as 2 June 5 June pusilla have moved onto the tundra, largely in flocks, since yesterday afternoon when McCaffrey & I perved the tundra. On the 4th there were pusilla displaying all day along both creek to the falls, along they are there as well as on Coastline Ridge. & heavily in flight, chasing one another, devices of 3-4 circling high + low over the tundra, parties of 3 instantly, fervently pursuing over distances exceeding 200m. & in intense tail up display to 90°, occasionally erecting wings. Watched one & in flight call- motorboat song - alternately hovering + gliding not opening wings more than shown in diagram, body slightly tilted, tail fanned, feet up against the tail (not dangling). After motorboating for variable duration often > 1 min they glide down in V wing posture, frequently silent but occasional giving call somewhat like Dunlin