SPMylars 1974 Journal 28 February (cont) Arroyo Chico, Estancia Medeland, 35 Km S. of Jujando by road, Pto de Mladuniaga, Pcia de Buenos Aires, Argentina 1935) Took another linear grid reading. temp = 25°, wind strong from NNE, clouds = 25%, IVC sun = 2000 fc, shade = 400 fc. Totals: White rump 17,4 (26); Charadrius falklandicus, Maguari 13,5(16); Southern lapwing 8,4 (12); Neotropic cormorant 0,2 (2); Manthorn stork 2,0 (2); Brown-headed gull 0,1 (1). Because of light conditions (looking W into sun to read grid) no birds were read. 3 March reached subunit #1 of linear grid at 1819. En route across tower llanos saw ±50 buffle and 2 golden plovers. Weather: temp 27°; wind mod.NW; clouds = 0; IVC sun = 7000 fc, shade = 500 fc. Arroyo level continuing down, with a muddier appearing in subunit 4. Grid totals: White rump 18,21 (33) ↑ E - W side → total Charadrius falklandicus 8,5(13); Black- necked Stilt 0,1(1); Southern lapwing 5,8(13). Light NNE conditions made it impossible to read birds, though a total count running back along the grid yielded totals: White rump 43,80 (123); Charadrius falklandicus 18,29 (47); S. lapwing 17,17 (34); Black-necked Stilt 3,1 (4); Southern Screamer 0,3 (3); Speckled teal 4,2 (6); brown-headed gull 1,3 (4); Trudeau's tern 0,5 (5); Rufous-backed wagtail 2,4 (6) Correndera pigeon 0,1 (1). Light NNE After taking this survey we drove out onto the llanos. Tower Llanos, Estancia Medeland, Pto de Mladuniaga, Pcia de Buenos Aires, Argentina came onto llanos at @ 2000, searching for buffle roost with the intent of netting. Found several small flocks of buffle, totaling no more than 50 birds, but could not find a concentrated roost. Stayed until after dark. Our group of 7 located, another solitary (1) buffle. The £100 lapwings on the llanos gave us no receipt from their warning calls, even after the sun had set. 2 golden plovers, + 2 Thincorus ! The first of the season due (see op. accent). 4 March Arrived at dawn at 0710. heard first buffle at 0734. WR already in Arroyo when I arrived. 0736,5 sun cracked the horizon 0738 temp = 11,5° (up from 10,5 at 0500). 0% cloud cover, but a slight patchy mist. IVC sun = 500 fc = shade. 2 wader stork in Arroyo this morning, at 0740 one flew around the horizon several times. Although favourable weather was prevailing throughout most of the observation period (til 0935), more appeared on Grid 10, and only during one sample (0830) did I only get de Grivito. One flock 30 WR flying away from Arroyo