J.P. Myers 1974 Journal (9,18) region Estancia Medaland 35 km S. of Juninco by road, Ptdo de Malvajing y Pto de Batias, Argentina 27 September Sun on horizon at 0633, temp = 3.5°C. no wind, 30% clouds. By 0710 cloud cover increased to 80-90% and by 0845 it was raining hard. At dawn we drove to the (9,18) region and immediately censused birds present. Along Facultous road leading to (9,18) there is considerable water lying in the ditch running parallel. The (8,4) swamp now has several hundred m² of surface water. Arroyo Chico water level is not greatly increased, but enough so that a small series of islands just S. of the bridge are now covered. Arrived at the (9,18) region 0730. Census white Tryngita subruficollis 142, Vanellus chilensis 43, Pluvialis dominica 208. Also present: Molothrus maculatus, Larus maculipennis, Mihirango chinango, Eremophila curvirostris, Speotyto cucullata, Colaptes campestris, Phragus sulphureus, Agymenops perspicillata, Anthus coruscans, Molothrus bonariensis, Agelaius thilius, Pseudoleistes virescens, Sicalis luteola, Zonotrichia capensis. Finished census at 0755. As the other day, the census, at least in so far as Tryngita is concerned, is laws: offer something by running down the fence and back way along the eastern edge of the field (i.e. the two long sides), [illegible] to the site where bufflews were densest (1,18) and counted, from one position, 600 151 Tryngita, 50 goldens, and 3 Vanellus [2 incubating @ ~75-100 m apart]. The last census taken here was 15 September. Accepting the #s of each species in both samples as a representative index, the following changes have occurred: Chrotoptilus ruficollis is gone; Pluvialis dominica has increased fourfold, Tryngita has doubled. Vanellus remained constant. After censusing this morning I also found 6 Tripsa harmonia in the field, Trio flammeus, and 2 Cisticola buffoni - one hunting near fly-field along the roadway. At 0845 we were forced to return to camp because of rain (had left birds out to dry). (10,13) Arroyo Chico, Estancia Medaland 35 km S. of Juninco by road, Ptdo de Malvajing, Pto de Batias, Argentina 29 September 0445 reached the curve below the tower for banking. Slight W breeze, temp 35°C, cloud cover low and heavy, observing an almost full moon. We put up 2 nets and would have done more but for the unexpectedly early first light - 0610. We stopped working on the nets 0520. However, no birds appeared until 0543, when the first golden flaw over calling At 0546 white groups called near the nets, and by 0655 there was a mixed flock of bairds/white-rump numbering ~30 birds foraging by the nets. We caught and banded