JP Myas 1974 20 Tryngito subnuficollis Tower Llanos, Estancia Miedeland, 35 Ks. of Juancho by road, Ptdr de Madariaga, Pto de Buenos Aires, Argentina 24 January cont'd have been depressing to tad. Tail down by other bird continued for 3 minutes; after which 1/24 E flew at other (which flew back to (0,6), (1,6) area). 1/24 E continued to feed 0900 & began following 1/24 F, picking it up in (A,1). It appeared to be using an area used by a bird that had inhabited before with 1/24 C. Followed for 32 minutes, after which it flew. 0915 Lois picked up 1/24 E 1/24 G in upper right area of grid, beyond 1/24 B. This bird spent the first 20 minute (out of 45) near the grid or out it. Slowly however it shifted the focus of its activity N and away, reading the (90) unit of 4b. At this distance it was confused with another bird (min 45). During the early part of the following season 1/24 G chased out other buffle 5 times. After leaving the area it chased one flying bird toward the original focus. The transitional nature of the flocks today - along with the markedly decreased density - contrasts with yesterday's activation here. 25/27 January — on Grid 10 at 0430 for netting + banding. Stayed until 0800. Throughout this period only 1 buffle appeared in on Grid 4, 6, or 10. Heard some fly by, + saw others down the beach. 11 February see Journal for the account of dismal decline in buffle numbers. None on Grid 4 area. 12 February see Journal 16 February while running the linear grid in the llanos we passed by Grid 4 at 0920 — 5 buffles were on it, with another 10 at least in the immediate vicinity!! Addlethia 1220 reading subunit 1 in linear grid — Chareduis falcklandicus determinedly, chasing buffle off of area. I've never seen a Ch.f. chase a WR! — so they have ample opportunity. 700 m W of Farmhouse Ang, Estancia Miedeland, Ptdr de Madariaga, Pto de Bs Aires, Argentina. 17 February collected 3 buffles after brief search for them, 1015. Saw fewer than 10 in the area about grass area beyond the first windmill (within 200 m). Tower Llanos, Estancia Miedeland, Ptdr de Madariaga, Pto de Bs Aires, Argentina 20 February 0915 driving out to end of linear grid for count we found several groups of buffles dispersed over the llanos, including 15 around the tower on grids 4, 4 and 10. Birds were dispersed in small groups of 3-6 and most of them foraging well separated