J.P. Myers 1974 Tryngites subruficollis 60 Grid 17B, Tower (1,18) region, Estancia Medallon, 35 km S. of Juancho by road, Hdo 22 November de Madalingo, Pucia de B. Aires, Argentina cont'd 01-16b, which then returned to the center of its territory. 0730. Large spook. By 0731, no one had returned. The spook originated out of the WNE; we could see it spreading in a wave as the flicker between the farm house road + the tower- took off, second by second the wave rushing toward the tower. It took less than 15 sec for it to spread that distance, ~900m. Propagated, it appeared, by Pividal's calls. 0740 - no one had yet, or flock is in unit 10 of grid 15, and they are the only birds which I can see at this time in the whole region. 55 buffins, 17g/day. The flock is very tight, but looks as if it is radiating from the landing center. All are foraging directionally. 0805 - (the flock had reached sub 8 of grid 15 - 100m W of the tower. A few are in the grid (2). Another small group has reached the area E of 17b. They may be coming back in. 0818. 19 buffins moving directionally across grid, entering from 3,2 region. See sample at 0820. directional flock. 4 more birds just came in at 0822, but at 0823 the flock flew again. They had just started to supplant from some regions - consistent supp's as we had been seeing prior to the 0730 spook. Flying now over the (1,18) region, landed in 17a. 0828 - quickly dispersing. I count 22 goldens and 85 buffins. Some of the flock going directionally N, others S.-i.e. These are radial dispersal, and the main group is splitting into smaller directional flocks, which themselves ('in units') are going in different directions at d.f. ratio. Curiously there are also now buffins + Plumuela flying up from the W, as if a % had gone to the Trango. 0834 - a number of birds have reached el grido. Tryngites entering from E + from W. There is also a solitary bird which somehow reached the middle sans my seeing of (in 0,2). 0836 - Small flocks continue to pour in from direction of Trango! Did they make an early flight down? The magnitude of the spook, particularly the length of time that they remained in a tight directional flock + that they remained off of the grid suggested so. There was certainly time (0828 - 0828 when there were so few birds in the entire 1,18 region, that some