JPMyers 1974 Tryngites subroficollis Tower Llanos, Estancia Weddell, 35 km S. of Juanico by road, Ptdo de Madariaga, Pro. de Buenos Aires, Argentina. 18 January cont'd at the feet of the other buffy, puffing its bill down to the ground. Action continued for several minutes, then they separated. Just then a carranola flew over, shadow crossing gird. Nearly all birds took flight, alighting near but not on, their original positions. I have the impression of "fussing" between the birds, but I cannot discern the source. Another interaction began 1850: "A ran towards 'B,' from a distance of 15 m. (happened within 5 m, and + they turned to face SW, paralleled + started the above "fussy" feeding behaviour - Will does not penetrate into grass as far as usual, merely touching the tops of the blades. Cont- rmed behaving like this for over a minute, working closer+closer together until <5' apart. At which pt A buffeted B upwaring. Wing flapping by A (wing next to B, did not open completely). They then separated, A heading toward where he came, B going away in opposite. In all the interactions between this pair in the last 3 minutes, A was the aggressor. 1855 - buffy has a favourite cormorant, 4a (0,2), has been working around that one for 10 minutes. But at 1855 a golden chard it off (and the golden com- menced feeding there). 1904 - Buff running fast to Won grid 9a 15 m behind I was another buffy (A above) following, running too. Did not stop till B was off 4a by 5-7 m. At which pt A stopped, turned parallel, and fed a little. Then A turned around + went back toward center of grid. then 1/2 min later a 3rd Buffy landed 2m from B, B then raised both wings jumped up or down (once), then the two of them began feeding 5m apart for 3-4 minutes. At 1910 - A in (1,3) when 2 buffy flying, lashing 15 m to S. As A landed, A immediately started running forward landing site. Second Buffy landed immediately in front of A (as it was running). A then pursued ↑25 m. to (2,1), then A went after, flying + chased. Chased. 1912. 5 buffies within 10x10m, moving north, feeding. 1914 A had on again near (0,5). 4 other buffies quite close together. Occasional every few days, but quite different from earlier spacing. New birds? or effect of time of days? 1920 - A supplanted again, this time from (0,5) area. Pore by flying individuals.