J.P. Myers 1974 Journal Grid 17b, Tower (018) region, Estancia Medaland, 35 km S. of Juancho by road, Pto. de Madalanga, Pcia. de Buenos Aires, Argentina 28 November reached tower at 0550 and quickly repaired the damage caused by a windstorm of several days ago. Began sampling at 0630. This morning contrasted with recent days because of the extensive light frost, both in and around camp as well as out in the open grasslands. Birds were arriving with us, although some had already invaded the area. [back to weather-7 0% cloudy a light NW wind which was all that remained of hefty gales winds present from 0300->0330. During the morning until 1130, I sampled buffy and golden dispersion every 15 minutes (see 176 data book.) Simultaneously, Lois recorded finer, positions, and types of aggressive behaviours occurring on the grid (see 16-17 data book). Grid totals: Tryngite subnifollics 7.1 (3-10)/49 Pluialis dominica 5.0 (4-7)/105. 21 samples plus one spooled sample (the latter not included in the grid totals.) The general picture on the grid this morning was, again, for both buffy and Tryngite, territoriality. The bird's dispersion was very stable; indeed we saw only two teritorial spools, one of which was caused by one yelling at naughty sheep. Observation revealed that 12-13 territorial criping upon the grid. Their size and shape were similar to those of teritories of 11-22 (see buffy spacent), although in parts of the grid there had been some cage- expansion. (Given the conformity of the area + the fact that there are not enough prominent landmarks present to allow one to hypothesize that any group of buffy would use the same borders, I am led to conclude that the same birds are involved. See Tryngite spacent. A % territorial bird calculation for Tryngite for c samples taken between 0900->1130 yielded a value of 97% TB. This may be somewhat low. (yes, low.) Wind circuared to mild-strong NW by 1130. (7.12) Estancia Medaland, Pto de Madalanga, Pcia de Buenos Aires, Argentina at 1820 I began counting shorebirds flying / 5 min time periods, recording circuit vertical flight (Vc) with a gossen-luna pro spot meter. Records all transcribed from the tape into the flocking accent of this notebook. We moved the observation post from (8.11) to (7.12) (that (at the former site we have several evening data; see flocking accent) because the low total number of Tryngite pairing was at (8.12) last 17 November and because