J.P. Myors 1974 Calidris fuscicollis (11,16) Arroyo Chico, Estancia Medaland, 35 Km S. of Tiernacho by road, Pto de Madacinga, Provincia de Buenos Aires, Argentina 25 November (cont'd) Tailflur upstream from the grid, at below and upon subunit 4 (200 m upstream), there is a large flock which spreads down as far as sub 3 (the grid inquisition). Birds appear to work from the sub 4 region to the sub 3 and back, or at least pressure waves reach sub 3, even if it is not the same birds involved. 1003 - Cabandoned its territory, flying 25 m upstream, and is now working back up. 1015 - Spicked up 3 birds in the vicinity, one being 'A', another a bird usually about A, and the 3rd one which has worked downstream. It is now obvious that this bird is C, having begun to surplant again as before, with the same face of aggression. Territory of 11-25-74 A Territory of 11-25-74 continues upstream to 17-18 Arroyo Chico upstream → Stake # 1 10 9 8 7 6 5 4 3 2 1 0 -1 Subunit 3 continues on → 5m unobstable materials Area censused + for which calculations were made (23,32) Arroyo Chico, Estancia Medaland, Pto de Madacinga, Provincia de Buenos Aires, Argentina 27 November Resighted Rqlg A today, first new resighting of one of last year's birds for some time. 1130-00 have been watching the flock in which Rqlg operates 6ed for 30 min, during which time they've left twice, once partially within the flock overlapping in space with its previous spacing position, and the second time flying 25 m downstream. The flock's behaviour prior to a spook was typical to that of the highly dense flocks of wke in prime habitat which evidences a confined degree of space-specificity - for example, similar to conditions of 13 November (as we spaced). The presence of Rqlg is revealing: each time that