JP Myers 1939 20 Paludis fuscicollis Arroyo Chico, Estancia Medelane, 35 Km S. of Juancho by road, Pdod Naderiaga, Provincia de Buenos Aires, Argentina 17 March (contd) Rclr was not found for the first time since 2/55. RyLrg appeared first in subunit 4 at 080?, then in subunit 1? at ~1000. 12 March again in early morning - 0805 - Rplr and flock are at the curve below the Arroyo. 18 WR with it, (including 7 roting birds at this hour?) 0840- finished grid count. Nothing unusual except for absence of WR from subunits 2 and 5. total of 33. Running down Arroyo dam emphasized by the amount of movement the WR are kinda taking, especially in 8-10 area. Bounds! 124 birds - and Rplr again shows up higher on the linear grid, little yesterday. This time it and its flock appear to be in 6-5 region. Bounds! again - 15 landed birds, a record. Rplr showed up between 7 and 6, and RyLrg, after not showing since 4 March, have returned to its old haunts. Only RyLyy of the regulars does not appear. This may have been due to high rate of movement in 8-10, where usually find it. After running down the Arroyo to subunit 15, we returned up to 7. there was a major change in bird distribution between since we passed on the way down. No feeding WR were found between subunits 1 and 6, subunits 6-7, when there were 2. In fact, slow mo landed WR between 3 and 6, when there were several small groups of roting birds, perched around on, and behind cow pie or horse shit. Even RyLoo, a known territorial bird, was not on 5, though it had been 20 minutes earlier. However, on 7 I found RyLop, a bird whose total following data from because its relative ranking over the past few weeks suggested territoriality, 1032 began, ended 1132. RyLop (page 4) of linear grid following data book) is territorial, as are neighbors on both side. RyLop's territory extends: however feeding was seen afar. So 18 and 19 O. On both of these occasions, however, RyLop was supplemented. (only two times which it was the attacked bird. All but 6 minutes sampled were spent within the territory. In the 1st 30 minutes RyLop supplanted 8 birds; attacks, even in flight, ended at border. Bird could feel just beyond 5, + despite RyLop proximity to 5 (less than 5m) it didn't attack However, But supplementary behavior involving flights of over 15 m were seen. I was struck by the existence of a buffer zone between RyLop's territory and that of the bird.