JPM Myers 1977 Calidris melanotos Barrow, Alaska 1 July What given? We are being invaded by melanotos. That in itself is not unusual for this time of the year. What puzzles me is the # of PP in the flock, obviously not breeding locally. 5 July melanotos numbers down abruptly since 1 July (140 total ♂+♀ decreasing to 37 on transects. 98 in mixed flocks w/♂♂ 28/19 more or less. On trans 6-10 today found no more than 399, w/ broods - none of which I saw. (see Journal). 11 July a second peak in ♂ numbers arriving now strongly mixed w/♀♀. See transect summaries. It appears that unit (17,1)(18,7) and (19,1) are used each year by ♂ flocks, located as they are on the downwind (SW) side of South Meadow Lake. A flock of over 20♂+♀ melanotos on the lakeshore + immediate marsh there, mixed w/ a few maria and 40% fulicarius ♂. melanotos is now scattered widely over most transects in loose flocks. 45 ♂♂ on T1-5 this a.m. SW side of Meadow Lake 14 July out on S. Meadow Lake 1400. territorial ♂♂, probably territorial ♂♀ here, scarring up wind blown material along the lake shore. Territorial areas small, less than 10 m long and 1 m wide - i.e. they are classic feeding territoriality. over 30 melanotos here doing same. They have been here since the winds began 6 days ago. Collected 29♂ to look at molt + good condition. NTB present also for note see next page 15 July melanotos still territorial here along S. Meadow Lake. watched for 20 min as several supplanted consistently. Territorial area smaller than I originally estimated, some areas less than 3 m long. Good boundary defenses seen - tail down, crowd, chewing and supplanting. Several certain ♂♂ also involved, probably territorial, certainly aggressive. much aggressive vocalization, clucking. one ♂♂ giving something clonal like a continuous churr in flight, hovering over a very local spot (actually flying into the wind not making any forward progress, 8/10m off ground) when a flock moved in probably because I was present. I sat down to observe but they failed to adapt to my proximity. ♂♂ fulicarius present along same lakeshore in same sit not supplanted (nor supplanting - showing no sign of aggression)