JPMyers 1974 Journal Farmhouse to (18,10) region, Estancia Medaland, 35 km S. of Tuancho by road, Pto de Madariaga, Pcia de Bs. Aires, Argentina 10 September (cont) 1015 left camp and drove NE toward La Manga, looking for buffalo in upland area where I had been last year, and checking out two lakes for preps. Cebotur idyllis - a slight N wind, no clouds, temp ~18°. During the short trip I found no upland shorebirds save Vanellus, which found me on their own. The two lakes still were full—or at least contained sufficient water to obscure any suitable prep foraging habitat. Buphala (19,7) in a small pond with tole (the tole ~ 3m diameter). Within the tole, in fact perched on top of a matted area, is an occupied camancha (Polyborus plancus) nest with 2 eggs. 2 pectorals flew by as I investigated, one feeding at the edge of this tiny pond, and remaining till after 1400. (2,18) region of Estancia Medaland, 35 kms of Tuancho by road, Pto de Madariaga, Pcia de Bs. Aires, Argentina. 1255 left camp toward (2,18) region (i.e. Rte 11 field). En route saw that the pond at (3,5) dry today. A moderate N wind developed during the morning, temperature decreased to 21°C, clouds oscillated but towards the evening increased to 30-70%. We spent the afternoon looking at upland shorebirds on Rte 11 field, particularly Tryngite (see appendent). Upon arrival I censused the area (see below). At dusk we tried to establish where Tryngite were roosting, unsuccessfully. (see appendent) Census results: Vanellus 25, Pluvialis dominica 36, Oreopholus rubicollis 59 Tryngite subruficollis 54. Also present: Nothura maculosa, Milvago chimango, Larus maculipennis, Zenaida auriculata, Sprotyte curicularia, Colaptes campestroida, Cinclodes fuscus, Ptinangus sulphurescens, Lessonia vita, Anthus coenendera, Anthus forcalus, Pseudoleiste virescens, Spinus magellanicus, & Lambs flying over Bomotrichia capensis, Euphernagra capensis. Returning from the Rte 11 field we came upon 5 Thinocorys in (12,12). Arroyo Chico-(3,13) to (15,27), Estancia Medaland, 35 km S of Tuancho by road, Pto de Madariaga, Pcia de Bs. Aires, Argentina 11 September 0815 left camp. 100% clouds. Temp = 8°C at 0630! (how warm in contrast to last several weeks). no wind. The cloud cover was also different from previous days—not only was it >70% at dawn, but it was a high, thick stratus with little of the usual few thin cirrus. The tropo level had dropped perceptibly in the lower reaches, almost certainly because there is no longer a wind to pile it up. The channel was due N from (un wide at (9,13). By 0930 I was at little grid 11 (15,27) and managed 2 readings before a combination