J.P. Myers 1974 Journal 35 26 February Tower Llanos Estancia Medland, 35 Km. S. of Juendea by road, Pto de Madariaga, Provincia de Buenos Aires, Argentina Chirudo: 578 temp = 16° wind: light NE. 0743 RB Negrito appeared. As before, we did not see the traffic until they were well into Grid 4 foraging - they appeared magically. First Gally cucked Grid 20 at 0745. 0731 sun just cracking the clear horizon. First Swallows at 0736 - all flying W 0740 - the birds moving in herds again - very similar to yesterday - they sweep across 0945 - again as yesterday, there is a lot of flying. The Roper [illegible] Very little aggressions. [illegible] The Roper [illegible] (See 2 percent) Remained on tower until 1000, taking 28 samplodding that time period: Total: Grid 30 Buff-breasted Sandpiper 2.6 (0-8) 73; Rufous-backed Negrito 0.2 (0-1) 5; Conoverda pipit 1 (0-4) 28. Grid 4b (8 sample): Buff-breasted 8.9 (3-19) 71; Rufous-backed Negrito 2.8 (0-8); (Conoverda pipit 19 (0-4) 15. Immediately following the first samp on the tower I began reading the linear grid along the Arroyo Chico, Estancia Medland, Pto de Madariaga, Provincia de Buenos Aires, Argentina Immediately following the first samp on the tower I began reading the linear grid along the Arroyo Chico. Totala: White-rump Sandpiper 17, 18 on each side; Charadrius fulicarius 10,6; Greater Yellow legs 0,2; Southern Lapwing 0,2; Brown-headed gull 34; Speckled teal 0,2. Then, I returned south along the arroyo, counting birds and searching for landed w.r. Totala: White rump on grid both sides 20, 42 between units; Pectoral Sandpiper 10; Charadrius fulicarius 22, 21; Black- cocked shith 0,2; Greater Yellow legs 1,3; Southern Lapwing 2,7; Neotropic Cormorant 3,1; Southern Screamer 2,0; Speckled teal 0,6; Brown-headed gull 4,4; Turquoise 1,3; Rufous-backed negrito 1,1; Conoverda pipit 0,6. Beyond the south end of the grid were 4 cor. The total # of White rump along the linear grid today compares favorably with those seen 2/24: 162 total today, as opposed to 64 on 2/24. However, there has been a decline from 2/20, when 85 were found. And the decline beyond the south end of the grid (where 4 were seen today) is even more striking, down from 22; this had been a fairly constant number. From the fence to the end of the Arroyo property at the Arroyo Chico Bridge. There were no WR on flies stretch of the Arroyo, N 500 m. However, there was one Golden Plover. See Ch. Jalk up acourt for for list of WR band neighbours. WR weighting build in chart in Grid 30 book. 27 February I arrived at the tower at 0720. Within 2 minutes I had seen traffic on the grid, so I arose