JPMayers 1973 Golden Plower 2 Km [illegible] N of Farmhouse, Estancia Weekland, 35 Km S of Tuancho by road Pcia de Buenos Aires Arg. 24 November • 1930 got on roof of Citroen to look for roosting flights of plowers and bufflos. There were a few large (10-15) flocks of golden between 1930 and 2000, but nothing as big as the [illegible] large (30-40) bird flock seen about 1800. Small groups of plowing and solitary golden flew to the ENE from here and looked as if they might be going down about 15 km away. But with the light so low as it in, and with the fact that the birds are flying erratically and low to the ground (they come down frequently so they pass the field in which we are camped), it is difficult to tell when or where they stop. But up to 100 golden have accumulated in a 150 m half circle to the W from here. They are feeding, but much closer together than typically seen in the daytime - no aggression. Some birds are feeding less than 10' from one another. A lot of vocalization, both from flying and landed birds. No sign of roosting - i.e., they continue feeding without any preening, sleeping etc. Contrasts with buffly behavior. I quit watching at 2045 because I could no longer see anything, got up until the least time that I could, the birds were still feeding, still spaced apart. Frequency of overhead flights appeared to sleep. 25 November 0530, in the same field where flew half bar, 100 birds last night there are less than 20 this morning. Spooky. Very spread out - more than 20 yds to one another. Very few flying overhead. Tower Llanos, Estancia Midland, [illegible] Pcia de B.A. Argentina 19 December There had been few flying golden during the morning; they were on the grid at 0530, and although solitary individuals were flying, I saw no flock. Then at 1000 several large flocks appeared out of the W, flying low over the tower. 100+ birds in one. Between 10 and 1020 several such flocks came over tower Llanos. Finally one landed ~300 m East of the tower. The birds (60-70) landed together, quite tight. After standing still for <1 min, almost all of them took off down. Then, within 3 minutes, they started to get up again, this time beginning feeding. Birds moved while feeding in all directions out from the center landing. No aggression at first. A few birds flew beyond the farthest ones, up to 100' or more. Then, after the center became somewhat thinner, the incident of aggression appeared. I watched one bird chase 3 others in succession. It was not the only one so engaged.