JPMyers 1979 Calidris fascicollis 35 Tower Llanos, Estancia Medland 35 km S. of Tandil by road Pto de Madariaga, Provincia de Bs As, Argentina and the N end of the linear grid between 1050 and 1145. 22 WR in 1st Km; 77 along linear grid (3 km). Remarkable correspondence to yesterday's count over the same area of 37 and 74 WR respectively. 2 banded birds: R. Red and R. Yellow L. Green. The former is back to the spot where we saw it was seen 12 February, although not in the afternoon. The second is [illegible] still defending its territory, first seen 11 February. During the day we passed by R. Yellow L. Green's territory several times, the last being at 1900 — the bird was on and defending at all times. 2 other WR are typically present, one on each side. R. Red L. Red was gone when we passed its haunt at 1910. However another banded bird (Rovory Lyellow) was in the immediate vicinity (W end of linear grid subunit #2). Linear Grid, Estancia Medland, Pto de Madariaga, Provincia de Buenos Aires, Argentina Banded birds at subunit 5 — see journal took upward 4 samples of linear grid today (see journal for totals). Also counted WR along whole WR stretch of Arrayo, finding 91 birds present, a total very similar to those from previous days. Banded birds spotted: R. Yellow L. Dr. Yellow (0900, subunit 6, 1; 2000, just past subunit 50); R. Yellow L. Yellow Green (1737, subunit 5, 16; 2015 on grid 12 (just past 5)); R. Yellow L. Yellow Red (1737 subunit 5, 09). R. Yellow L. Green for territory throughout day; see following data in Grid 4; Linear following data book) R. Orange L. Yellow (morning, subunit 2); R. Red L. Red (morning, between subunits 2 and 3); R. Yellow L. Yellow Orange (morning, grid 12); R. Yellow, L. Orange Yellow (beyond grid 12). A total of 7 birds. During the 1000-1700 reading of grid began noticing basking birds in flocks (not catching any on grid). By 2000 they were beginning to fly up. As noted above, I took following data on R. Yellow L. Green on its territory, just beyond subunit 1 when we placed stakes in order to be able to examine R.Y. Lg.'s territory. Staked 1942. There are 5 or 6 birds on each side of R.Y.Lg's territory, which stretches at least 60m along both sides of the Arrayo. During the 60 min period R.Y.Lg. flourished view (hidden by car) once, returning after 2 minutes. Obvious well maintained border with 21164, the WR to the N. 3 supplementation in 60 min great distance ±35 m. This data is in Grid 4 book. 17 February 1 sample from linear grid, 4 from Grid 12. See journal for totals. 3 banded birds: R.Y.L.g. (territory past subunit 5); Rr. L.r. (subunit 2,3); Ry.L.yg. (Grid 12, various units). The latter bird impressed me advising own territory. 4% of WR down in Grid 12 linear grid.