J.P. Myers 1974 Calidris fuscicollis (15,26), Estancia Medaland, 35 km S of Juanico by road, Ptdo de Madariaga, Provincia de Bs. Aires, Argentina. 19 September by the mixed Baird's/Curlew flock observed 15 September. 0814 - continuous low frequency chatter perceptible from the car at the same time, I see no head-head orientating (asive confused right now) because scaral crows are close enough to be causing a disturbing effect. 82° of the flock have dropped out of the moving flock now, beginning to preen. Front for so still moving. Others around 30m upstream (downwind). Then dropping out began to pick + preen in plain view. It looked as if when they did so I began to see much more parallel - with the wind - orientating not invariant. 3 more dropped out of front. 0822 the 'drop-outs' are still in a row where they remained. 0827 2 moving upstream, then all flew - upstream. 0830 watching 2 were foraging. One was approaching the after head-on, came within 4". Then as they approached closer, they began to shy away + around, until not facing, passing around. 0842 moving part of flock continued on 40m, 6 birds very tight. Behind them (i.e. in area through which "invariant" passed) are strung out 9 birds, apparently remaining evenly spaced in a line along the Arroyo. 0847 the strung out birds were moving on. (23) Estancia Medaland, Ptdo de Madariaga, Provincia de Bs. Aires, Argentina 22 September see journal vartv 8.12 to 11.17 Arroyo Chico, Estancia Medaland, Ptdo de Madariaga, Provincia de Bs. Aires, Arg. surveyed fuscicollis flock between (8.12) and (11.17) on Arroyo Chico. fuscicollis bairdii locabini 33 2 (8.12) 0 2 (9.14) 2 0 (9.14) 15 0 (10.13) 11 0 (11.15) 34 1 (11.15) 14 1 (9.16) ______ ______ 109 6 *1720 - of not is the reappearance of White-rump Lyg. I bonded more with that combination, making it either Ry Lyg or Rolyg as it has probably lost a band.