JPL Myers 1979 Journal 54 Mouth of Canal 4 into Laguna Mar Chiquita, 21 km N of Mar Chiquita by road, Pto de Mar Chiquita, Provincia de Bs Aires, Argentina 21 March contd Directly out from the mouth, ~200 m, were scattered WR on a shallow flat. This flat changed abruptly into what appeared to be deeper water with numerous arquero-like flapping birds (except that they were not). Great gilded terns were out beyond, and 2 flocks of ~30 Roseate spoonbills fringed along the edge, as well as many hundreds of Hudsonian Godwits. To the WNW, were the water got progressively shallower, then were broad shallow flats, many hundred yards wide and over 1 km long. The mud changed from a sandy firm bar to a lothan which, the longer one stayed in one place, the more it enveloped me. (I had, with a negligible mat). Before the mud changed there was a small sandbar, perhaps 75 x 100 m. On it were 300-400 [illegible] and beyond, in the broad mud flat, were thousands of WR. I estimate that there were over 5000 WR, several hundred Microspalama, and little black see WR opaque. The WR were polarized, most of them fringing into the wind. I saw no small birds which were at all reminiscent of any other species (beside the Microspalama). The conditions were not ideal for a thorough search. In addition to flux, there were Greater Yellowlegs, Spotted teal, shorebirds, Yellow-billed pintail, Cocoi heron, Black-necked Stilt (100s), both brown-hooded) and lap quetzal, 2+ species of tern, Corcoroba Swan, a few Flamingos, southern lapwing, southern screecher, a few Maguari stork. Arroyo Chico, Estancia Medland, 3.5 km S of Juandia by road, Pto de Madariaga, Provincia de Bs Aires, Argentina 22 March 1445 reached subunit 3 of the Lincan grid. Cloud cover extensive, 60%. Temp 22°C. (Wind was strong out of the NE.) Immediately I began sampling the grid. Total: White-rump 5,7(12); Charadrius Falklandicus 8,7(15); Greater Yellowlegs 3,0(1); Black-necked Stilt 2,2(2); Southern lapwing 3,2(5); Spotted teal 4,5(6); Brown-hooded gull 8,0(6); P. pipit 1,0(1). Abundant the last sample, Hu #6 WR was low and comprised largely dry territorial birds. By 1600 we were in its territory in subunit 3. By this time in the afternoon the number of flycatchers using the Arroyo had dropped considerably from the herds usually present during mid-day hours. After completing the sample, included running back down searching for landed birds (prevented by poor light) we confirmed on upth Arroyo into Potrero 19 Grande. After making a forced 1 km Eastward detour in order to reach