JF Myers 1974 Journal (Grid 1, Arroyo Chico (10,13), Estancia Medaland, 35 Km S. of Tucumc by road, Pto de Madariaga, Pcia de Buenos Airo, Argentina). 5 November (cont'd) The Habitat data manipulation has yet to be done. Visually, the unit is a typical part of the Arroyo, except for the presence of several islands. So certainly there is a 'special effects' type of patchiness present - i.e. there are chunks of dirt spotting the water (see diagram in % km. calculations). It remains to be seen how patchily distributed is appropriate line [illegible]. Linear grid, Arroyo Chico, Estancia Medaland, 35 Km S. of Tucumc by road, Pto de Madariaga, Pcia de Bs Aires, Argentina 6 November 0615 spring went to linear grid. sunrise at 0542 at which time temp = 6°C. Wind happened up to a slight W at 0615. 5% clouds. Linear grid totals: Calidris fuscicollis 42; Calidris bailii 1; Limosa haemastica 5; Tringa flavipes 2; Pluvialis dominica 3; Charadrius fallaxiocos 2; Himantopus h. 4; Steganopus tricolor 1; Ardea gryphus 3; larus maculipennis 1. C. fuscicollis was very evenly distributed along the grid with a σ = 0.76. Lack of wind and preceding water produced (at least for the eye) an even dispersion of habitat as well. Because of time considerations, we put off running down the linear grid until after running grid 15: Grid 15 (0,18) region, Estancia Medaland, Pto de Madariaga, Pcia de Bs Aires, Argentina. Today in our first reading of grid 15 series returning to Medaland on 3 November. In several places it is obviously more ragged (the grass, that is). Sample went off without a hitch. Wind wind from SW, 5% clouds. total. Buffly 74 (0-14); Golden Plover (6-19); Baird's s. 7 (0-6); Vanellus chilensis 16 (0-4); Speedyto 2 (0-2) See grid 15 data book for counts. Linear Grid, Arroyo Chico, Estancia Medaland, Pto de Madariaga, Pcia de Bs Aires, Argentina. R30830 were back at subunit 1 of the linear grid prepared to read up (instead of dawn), recording shorebirds and recording sightings of banded birds. Total: Calidris fuscicollis 23,62 (85) ; C. bailii 4,7(11); Limosa haemastica 3,4(2). Tringa flavipes 1,4 (5); Arenaria interpres 1,0 (1); Pluvialis dominica 6,4 (10); Charadrius fallaxiocos 0,3 (3);