JPMyers 1984 Calidris bairdii 07 (5,13) to (15,27), Arroyo Chico, Estancia Medaland, 35 Km S. of Juanleco by road, Ptdo de Madariaga, Provin de Bs. Aires, Argentina 11 September (cont.) what was striking about this information was the degree to which these small foraging groups were preponderantly one species or the other. Also, bairdii appears to move about in smaller groups; indeed, as have noted before, individual bairdii can be found now. (15,21), Estancia Medaland, 35 Km S. of Juanleco by road, Ptdo de Madariaga, Provin de Bs. Aires, Arg. 14 September see journal - huge flock of upland shelducks including 100+ bairdii. 1755-17 baird's flew in, also some flying over. The flock coming in glided much more than usual, calling and they looked highly excitable, a large circle without flapping their wings. See journal (10,13), Arroyo Chico, Estancia Medaland, 35 Km S. of Juanleco by road, Ptdo de Madariaga, Provin de Bs. Aires, Arg. 15 September. 1845 stopped at the curve below Towner in Arroyo Chico (see journal). ~30 pce total present, ~5 are fasciollas, the rest bairdii. As we drove in the flock split into two groups, one of 13, the other 18. (also 2 falklandius pcead). The larger group still feeding, dispersed. The other began feeding and formed a very tight group (after ~5 min) until all were within a 1-m radius circle (3 cwr present). Much confusion - they were running in/out of 'circle' and everywelve within it. Then they all looked up (characteristically holding bill slightly downward toward tip, raised neck). remained in that pose >=20 sec. Then they flew. A bairdii flew over ~the same time, calling madly; the other group now for 17 members. [illegible] bairdii, SW. 684 slight rain began. 1822 - WR chatter. then a few moments later a WR, from 1+ away, ran full steam into a bairdii, bouncing off its chest. checked the baird's almost fell over. we came to 'investigate'. 1826 a few took to flight - went across Arroyo + then returned. 'Dont' by a pair of baird's - they are foraging ~2 m from the rest of the group, in back, one is feeding in deeper water (bill disappears to culmen) then they are 10 cm apart, maintaining that distance - one is mincing around as the other feints at it frequently. Both are facing into the wind (SSE) whereas in the main body of the flock this is not maintained as consistently. In the pair the maintenance of the orientation means that usually all the 'feinter' sees is the cloaca of the 'miner'. Now the 'miner' is leaving (1823). Distances in the flock seem to be consistent, the crucial