JPMycs 1974 Journal Arroyo Chico, Estancia Merland, 35 Km S of Tucumc by road, Ptdo de Madariaga, Provincia de Buenos Aires, Argentina 24 February contd Totalo accumulated during the survey running back along the Arroyo at 0835, counting all describ onsidants; onsidants; onsidants; total acen cue; White rump 24,40 (104(4)); Charadrius fulvicaudus 14,32(46); Greater Yellow lego 1,2(3); Black-necked Stilt 2,1(3); Southern lapwing 10,8(18); Neotropic Cormorant 1,0(1); Speckled teal 0,2(2); Brown-headed gull 0,3(3); Rufous-backed avigito 0,1(1); Geositta funicularia 0,1(1) Southern Screamer 0,2 (2). Bands seen in Arroyo; White-rump (see resighting chart and grid data RyLg; Roly; Rptg; RrLr; RyLyY; RyEyr; RyLor; RyLpy; RyLpp; RyLpr; RyLrp; RyLrg; RyLgy; RyLGr; RoLyy; RoLyP. Tower Llanos, Estancia Merland Ptdo de Madariaga Provincia de Buenos Aires, Argentina 2100 we drive to the end of termi llanos do the site located 22 February where Mld friend a flock of 80 buffle was beginning behind and it was going to react. They were there again. Tonight too to dark to count numbers, but there appeared to be roughly as many. Using a new netting technique (see buffle species accent) I netted one buff-breasted sandpiper + banded. 25 February 0640 arrived at tower. By 0645 WRs were in Arroyo. First buffle heard flying by at 0653. However it remained the only buffle detected until 0722 when I spotted the first buffles foraging in Huacirculo. They had walked into Grid 4, and were in (1,0) at 4 before we could see them. By 0724 3 buffles were on Grid 10. The morning was warm (temp at 0600: 15°) with no wind, and a moderate, low mist over the llanos, extending vertically less than 10m. 0939 sun just coming above mist. During the morning (until 1000) I took 45 sample on grid 10 (including 0715-0815 at 2 minute intervals, + all others at 10 minute intervals) and 2 on Grid 4b(0900,1000). Grid totals: 10: buff-breasted sandpiper 3(0-9) 130; Rufous-backed registe - (0-1) 3; Anthus converdern 0.5 (0-2) 18; Anthus torquata - (0-1) 1; Geositta curicularia - (0-1) 1. Grid 4b buff-breasted sandpiper 8(5-11) 16; Rufous backed registe 4.5(4-5) 9; Converdern papt3(2-4) 6; Cow 0.5 (0-1) 1. See Buff-breasted sparent for extensive description. I banded WR in Arroyo bathing (see sparent). One Redtail flying overhead the Snail kite flying overhead. Many cliff swallows. 26 February Reached tower at 0645. WR were in the Arroyo just after our arrival, and probably were before. No Guffie on grid at 0645. First one detected at 0713. 0710 JVL= life