JP Mapps 1974 38 Journal Tower Llanos, Estancia Medeland, 35 Km S. of Tandil by road, @ Pto de Madariaga, Provincia de Buenos Aires, Argentina 4 March (cont'd) Grid totals: #10 (4 samples) Buffy 0; Rufous backed Negrito 0.25 (0-1); Corvendava Pipit 0.25 (0-1). #9b (9 samples) Buffy 1 (0-4) 4; Rufous backed Negrito 10 (8-12) 40; Corvendava Pipit 1.25 (0-5) 5. Arrapo Chico, Estancia Medeland, Pto de Madariaga, Provincia de Buenos Aires, Argentina Began reading hunter grid at 0834. totals: White-rump 14, 16 (30); Charadrius fallandicus 8, 4(12); Black-necked stilt 2,1 (3); Southern lapwing 1,8 (9); Brown-headed gull 1,0 (1); Neotropical cormorant 0,2 (2); Spotted teal 1,3 (4); Rufous backed Negrito 0,1 (1). Then beginning at 0905 (ending 1000) I ran back along the Arrapo counting + searching for banded birds. Total (white-rump 43, 43 (86) - total); Hudsonian godwit 0,1 (1); Greater Yellowlegs 1,7 (8); Charadrius fallandicus 10, 32 (42); Southern lapwing 3,3 (6); Black-necked stilt 0,9 (9); Neotropical cormorant 0,1 (1); Brown-headed gull 3,9 (12); Spotted teal 1,23 (24); Shoveler 0,3 (3), 12 banded WR, 5 banded Chlidonias [see resighting chart]. No noticeable change in Arrapo level Tower Llanos, Estancia Medeland, Provincia de Buenos Aires, Argentina From the S. end of the grid I drove up into the thistled area of the Llanos and found 2 Thincorus immediately. At most 40 Buffon bufflon. Evening - returned to Llanos 1930 and spotted 30 bufflon almost immediately after crossing the dry drainage ditch (see app. accent). We followed them until they roosted; 25 fly low, @ 2010. Sun set at 2025. Moderate NE wind dropped considerably just after sunset. Despite determined effort noted no Buffon (almost did get a call). Crows over a tumble-hunters. Moss 3/4 full, getting stronger; no clouds. Temp x 15 after sunset. Flock of Buffon accumulated to more than 50 individually but before settling they split-up again. No Thincorus over this evening, nor any golden plovers. Arrapo Chico, Estancia Medeland, Pto de Madariaga, Provincia de Buenos Aires, Argentina 5 March reached subunit 1 of linear grid 0935. Sun rose a minute later. Temperature = 13°C, Clouds 20%, already there was a slight N wind + the reddish dawn drizzle 22 could do imploratory in the day. Grid total: White-rump 13, 17 (30); Charadrius fallandicus 3,6 (9); Black-necked Stilt 1,5 (6); Greater Yellowlegs 0,2 (2); Southern lapwing 0,3 (3); Spotted teal 1,0 (1); Coots [illegible] curvularia 1,0 (1); Rufous backed Negrito 1,1 (2). Immediately upon reaching unit 10 I turned + ran down the Arrapo, country birds + spotting larks. Total: White-rump 17, 47 (88) [illegible] between 4 Hudsonian godwit 1, D(1); Greater Yellowlegs 3,1 (3); Charadrius fallandicus 25, 28 (53); Black-necked stilt 1,1 (2); Southern lapwing 7,10 (17); Neotropical cormorant 0,1 (1); Southern Scaup 9,2 (12)