JPMyers 1973 Southern lapwings Grid I (Farmhouse Puddle) Estancia Wredland, 35 km S of Joaquin, Provincia de B.A., Argentina. 24 December (cont'd) in the midst of other foraging shorebirds without aggressing. This true for the pair on the grid this morning that is chasing birds away from areas where their chicks are feeding. The adults thermally forage at some distance from the chicks (e.g. (0,2) to (0,-1) or 15 m) and fly to the chicks when another shorebird intrudes. 0739 The lapwings being a very disturbing factor, growing now into (0,2) + perhaps (3,2) 0750 SL-chased every one out of (0,1), (1,1) area. 26 December 0510 - Lapwings active now on grid. in (4,0) + rest of low (4,n) area. 0525 - chasing birds out of (3,2) - this sphere of chasity occupies at this time a considerable part of the grid. 0530- chasing from (0,0). Two chicks feeding in (3,0) and (4,1). Nowadell it chasing WR out of (3,1) and (1,-1) 0630 - Lapwings on a real pain. They are really disturbing the grid, chasing birds out of (4,0), (2,0) - all in there. 0705 Hall, a carancha (Polyborus plancus) caught, killed and eate a southern lapwing at the end of pond, ~125 m S of me. I had noticed several minutes ago that the flock of lapwings harassing a carancha at the end of the puddle were not always on the offensive. In fact, the carancha appeared to be following one tero in particular. Then the 7 birds centred their flight over the pond, reminiscently flying in tight circles, then another carancha joined the brawl, less than a minute later, the carancha grabbed a tero as if I made a pay beneath the carancha, headed in the opposite direction. 2 caranchas It appeared as if the carancha just shook out its talon. The predator immediately landed in the grass beneath the site of the capture. I saw a brief series of mutual head holding between the two birds, and then one proceeded to tear out feathers, while the other walked around. Tero's continued to dive (wank). Both birds flew 15 minutes later, with me having seen only one of them eat anything, they took the tero. 3 minutes after the killing, there were 7 teros howling. At 0820 a [illegible] 27 December Looking at lapwings. Lapwings very active on grid first 20 minutes following my arrival at 1125. Chasing shorebirds from lower half. 1335 moved off grid east to the field. This accompaniment followed the appearance on the grid of a snowy egret. The two 'chick'ed the chicks, which had been feeding in (0,0) vicinity, away also. Then about 3 minutes later it chased the