JPMyers 1974 Journal 23 April (cont'd) Arroyo Chico Estancia Niedland. 35 km S. of Junincho by road, Pto de Madariaga, Pcia de Bs. Aires, Argentina. There was no wind this morning, yet when I arrived there were several striped fly subit in the Arroyo which had no water - i.e. the Arroyo had dried to the point where it is reduced to a series of puddles (albeit some several hundred metres long). (See infra Cl.1 + Trib spp.) Long stridulo between 6+7 and again 4+8 one day, although these subunits themselves have water. After settling near the grid, beginning at 0917, the starting time was somewhat later than usual, and may have contributed to my seeing some Sicilia luteola (Grid 12A); White rump 9,25(34); Hudsonian godwit 1,2(3); Southern lapwing 9,1(7); Charadrius falklandiæ 6,15(19); Zonibyx modatus 3,3(6); Black-capped Titi 4,3(7); Brown-hooded gull 2,1(0); Cinclodus fuscus 0,2(2); R.B. Negrito 3,0(2); Sicilia luteola 1,13(14). Over half of the WR recorded were found on subunit 9 (within). Between 9 and 10 this flood continued, with a total of ~85 birds, including several bands. Running down data was lost because of a tape-recorder shaft. Total of 7 WR weighing, including Ryllo and RylTrip on their repetitive territories; 3 Charadrius reweighing; 1 Zonibyx. See Res.chart. 24 April 1800 went out to Arroyo; temp 13°, Wind=6 (Beaufort scale) from S E, cloudy down to 60% after running 90-100% since 1100. It had dawned calm + clear last while I was away a Grid+ finishing note a southern storm blew up, threatening rain all day. Only a few isolated showers fell. The lack of rain was apparent in the Arroyo: a large area between the curve and subunit 1, including ponting of 1 are drying now. Lois left us and my newly created equipment for measuring microhabitat of shorebirds between subunits 7 and 8. I played flute for approximately 45 minutes, until shortly passed sunset. Took data on Ryls: Ro Loy (WR) and a Charadrius falklandiæ above there 25 April went out to Arroyo, arriving at 0815. The water level was up, but in a peculiar way: the strong S, SE wind which continued unabated through the night has apparently pushed water up the Arroyo, covering the areas in and before subunit 1 (which were dry yesterday evening). However, the invaded water did not reach upstream beyond just after subunit 5. On Grid 12 this is water - barely continuous + mostly the result of a dense array of cattle tracks retaining water. But Subunit 7, except for one small puddle,