J.P. Myers 1974 Tryngites subruficollis Grid 17b, Tower (118) region, Estancia Wiedeland, 35 km S. of Juanculo by road, Ptdo. de Wadaniago, Provincia Bs Aires. Argentina 20 November contd immediate judging from the pre-flight behavior of the birds - alarm calls, crowding, looking upward - the hawk precipitated the flights. It began with a series of Vanellus calls, followed by a wave of Phoenicurus cries, and finally with the take-off. The final 'landing' of these spoofs occurred in air (1,1) regrouping largely in the upper part of (1,1) [see grid sample] - then a directional flock began working eastward and moved in (3,1) and also (2,0). [another transcription period lost] - another second spoof of morning which began with three Vanellus calls. Landed in (3,1) out. Directional flock again coming toward tower. 0954 - bird of territory immediately in front of tower on 166 has reached territory again after last spoof. - this came in directional flock all the way from the 3,2 stake where it was at 0948 on landing. Upon arriving it immediately began a side-head supplantation towards the other bird. Interestingly, the way the SHS developed was: it ran toward the other bird approaching very close (much more so than usual, within 20 cm), the supplanter-'A'-kept it and stretched out just moved it from the up-and-away position to a low position, sweeping toward the object of the supplantation. At that point the object began running. 0955 - A also flew from 6m towards another encroacher. The other bird reported with a rough and tail down both retreated; the result of this interaction was consistent with supplantation and border fights which we were seeing before the spoofs. [more tape lost] 1027 - partial spoof. Some birds flew, others didn't. The territorial birds in the area by the tower did not go (2 of them). 1030 - another complete spoof. - began with Vanellus calling, Phoenicurus followed, a few birds flew, more flew and finally big territorial birds flew. Three later remained until the majority were in a compact, flying flock. However, some other known TB's flew at the crest. Following this spoof of sampled buffalos thrice at 2 min intervals (see data book). They had landed in (0,2) and (0,1) units and began returning to the (1,0) region and other heavily used areas via a series of directional flights. They are fanning out from the site of landing - TB's dropping out as they reach their territories, judging from the fact that when the flock reaches such a site (for eg around the (3,2) stake), one of the birds suddenly begins to supplant. See argument plot a whole series of supplantation. Spooked again at 1038 Spooked again at 1135.