J.P. Myers 1974 Tryngito subruficollis 66 Grid 17b, Tower (1118) region, Estancia Medaland, 35 Km S. of Juanda by road, Pto de Mad- curag, Pcia de Bs. Aires, Argentina 22 November was 'moderably' streaked during this cup - not fully up but not refracted, within. 1820 - individuals + pairs are taking off toward roof, going low but direct, the large flight. 1833 - semi spook, but not on grid 1835 first of grid birds left (one). 1847 still supplanted birds (now in fan (0,2)) The birds are definitely leaving the area singly. Some undulating by, going off grid, singly. [reflection ? is it possible that the 17 November roof flight count was affected by this new tendency to leave singly? Would reduce total seen because floderee so much easier to spot. It will also spread out the peak. Stopped observing at 1900. 28 November Due we go again 0550 climbed tower (see journal) 0630 began reading, the (wily) the grid left when we arrived. 0658 - supplmentation beginning again (see plot of locations times + types of aggression in 16-17 databook.) 0931 - one thing # interesting happening this a.m. - not only do we have a stable turn system, but there seems to be a # steady, low rate at which invaders test the grid. All are immediately supplanted. Perhaps this is producing a constant low rate of aggression independent of flu # interaction between grid denizens (except in so far as supplmentation of invaders sometimes pro- voke border interactions). A bird, which we may have 'picked up' flying 100 m away in this direction, flies toward + over the grid, then lands. It is immediately supplanted, until it may fly away or 30m to another area on the grid. If it lands again on the gird, it will be supplanted immediately. Thus there # a wave of supplmentation are produced. For e.g. at 0930 we recorded 6 in a row, the (1st + involving 2 birds supplantiing one, then a third and a fourth got into the act successively supplantiing one unsuccessful invader which moved! [illegible] each time. Obviously I did not # clickate many note in the tower thru a.m. we left at 1130. The situation was very similar to that of 22 November, in fact I believe it could be the same birds. For a time it appeared that the 01-16h wind was not there. However it turned out that it, or somebody using # the same boundaries + exactly the same greening area, had