JPMyers 1974 Journal 25 February 14 January Arraya Chico, Estancia Medland, 35 Km S. of Juancho by road, Pto de Bello Madanago, Pcia de Buenos Aires, Argentina 1030 Began drive from the fence at the S end of Tamar Llanos where it crosses the Arroyo to the N end of the linear grid, a winding distance of ~4 Km. Bathed. Counted WR's, looking for banded birds. The water was dropped noticeably in the last 2 days, creating many small lakes and connecting oxbows with the shore. Birds were speaker than 12 February, with even some of the WR flying in front of the car. Thus, the count see space. may be bad accounts. A total of 111 White-rumps, ~10 buffies, at least 50 Chandrais falcklandicus, ~30 7 golden plovers, ~5 Hudsonian godwit, ~10 GYegs, several LYL, several B-N Shift. The survey took 45 minutes. We had planned to repair the linear grid but rain threatened immediately (it rained 1:30 yesterday's to return to camp in order to see banded specimens. Of course it didn't rain. Temperature all day never rose above 68°. Wind light-moderate from SW, clouds 20-40% until 1900, when they became 100%. February 15 January Reached S end of Arroyo Chico in Tamar Llanos at 1050 and began driving slowly north along the edge of the Arroyo. Temperature 14°C, slight wind from S, low cumulus carrying 30-50% sky. The water level does not appear to have changed appreciably since yesterday. We covered the 4th km in 55 minutes - the count is divided into the 1st km + the last 3, because for the fact that the linear grid runs the last 3: Species, # in 1st/# in 2-4: White rump 22/77; Buffy 3/0; Hudsonian godwit 7/2; Greater Yegs 3/6; Golden plover 2/1; Charadrius falcklandicus 15/58; Southern Lapwing 5/17; Black-necked Stilt 0/7; Brown-headed Gull 24/26; Neotropic Cormorant 0/5; Southern Screamer 2/4; Speckle-throat 4/7; Ypuntiail 0/2; Cocoi Heron 1/0; Rufous-backed Aegrito 1/1. Two banded white rump; R red L red (opetted 12 February in approximately the same position; banded 27 January avid 10) at the N end of linear grid subunit #3, R Yellow L Green (opetted Feb 11, 12, and 14 in same position) at the W end of linear grid subunit #4, territorial. After finishing the count we worked slowly back, repairing the grid from the various of cows + high water, searching for banded birds on the way. Finished at 1730. R Yellow L Green was on territory all afternoon. R red L red was gone when we passed by at 1910. Found Orange L yellow (banded 15 January Grid 5 in Arroyo Chico) at N end of subunit #2, 1910. After buffies seen S of subunit #2 bathing past 1900. Besides repairing the grid, we placed 2 new small cans along the arroyo, one in a linear grid on the territory of R Yellow L Green in order to facilitate following data. The second just beyond subunit 5 in an area of banded WR range. this was a 2 dimensional grid 3x8 units upstream