JPMyers 1974 Journal Mouth of Canal 4 into Laguna Mar Chiquita, 21 Km W. of Mar Chiquita by road, Ptock Mar Chiquita, Provincia de Buenos Aires, Argentina 8 March (cont'd) visitors no deeper than 3 inches any when I went (although no greater than 100 m from shore) appeared but the WR flock continued out for some distance, but I desisted from counting because flutbirds were by then moving. After this became apparent, my attention shifted to collecting; 10 WR (097-105, 108) and 2 Stilt Sandpiper (106, 107). After shooting I repaired the car. Although the fog impaired vision, I did get some estimate as to the numbers of several species present: White-rump 500, Stilt Sandpiper - 30 definite, possibly as many as 100; Lesser Yellowlegs - 30, Greater Yellowlegs fewer, Black-bellied plover 2; Hudsonian Godwit 20 at least; Black Skimmers - 500+; Brown headed Gulls and Trudeau's tern were also present. Maguari Stork. I mentioned that the water was lower than last visit. Previously almost the entire mouth had been submerged. This time, however, there was a very slightly raised island, 50m x 50m, blocking part of the mouth. The water in which the WR were foraging remained under 1.5" for the large part. Beyond it was a large mat of thick slimy algae (See WR + Stilt Sppper-spp. accnt) Arroyo Chico, Estancia Wretched, 35 Km S. of Juancho by road, Ptock de Madangay, Provincia de Buenos Aires, Argentina 11 March Arrived in Arroyo Chico as sun rose above horizon - 0745. At 0730 in Arroyo below river we found 2 small flocks of WR - 25 birds in total, plus a partially mottled Hudsonian Godwit, and a Charadrius falklandicus. Temperature pre-dawn this morning (0600) was 17°C. but by 0745 had dropped to 16°. No wind had picked up before we arrived in Arroyo. Diverse cloud cover - very high clouds covering 60%. Lower, fog-like (but off ground) with v30%. Thuffies in thistle patch S. of tower. At 0800 we commenced scoping the lencuar grid. Sun N/L=200 ft. The Arroyo ice up slightly. Readily apparent by looking at the island in subunit 9. Today it has largely disappeared. Pickup one flock while reading grid subunit 6 - 13 birds just flown in. (Grid totals: White-rump 20, 9(29) Charadrius falklandicus 7,2(9); Black Necked Stilt 0,3(8); Southern Lapwing 4,5(9); Nicotropic (Cormorant) 0,1(1); Maguari Stork 1,0(1); Speckled teal 0,2(2); Brown headed gull 0,1(1); Rufous-backed Negrit 2,0(2). Then running down the Arroyo, looking for banded birds: totals (White-rump 24, 115 (739) ; Charadrius falklandicus 8,40(48); Hudsonian Godwit 0,1(1); Greater Yellowlegs 0,1(1); Black Necked Stilt 3,1(4); Southern Lapwing 6,3(9)