J.P. Myers 1974 38 Tryngites sobruficallis (0,18) region, Estancia Medeland, 35 Km S. of Juncalito by road, Ptdo de Madariaga, Provin de Bs. Aires, Argentina 18 September (cont'd) They are landing almost precisely where they were yesterday (corner of (1,20)). 0651 13 buffii going by, another [illegible] 0752 Cup wing display, repeated twice. [illegible] time held for 3-4 sec - the bird that was the object of the display <6" from displaying bird. The object had its head stretched up. Displaying bird did not stretch neck out but its bill was pointed up at 70°. As the object moved around in front of the displaying bird, the latter rotated so as to maintain the object in the focal point of the display. bill up neck stretched 0754 They flew going NE. At least some of them settled down behind us. 0756 Some flew landing 30 m NE, foraging immediately in largely a directional mode. 0708 Static flock area towards E, the latter of which is a static directional flock containing in beyond it, 19 birds, 4 in static. The former flew. The birds are flying a lot this morning, making following very hard. The movement is between local foraging sites. 'Whiffing' not unusual. 0817 a 'whiffle'. another. There is both a vertical + horizontal component to the whiffing. Flight path ground level "horizontal whiffing" from above That diagram above is supposed to show that when the buffii is flying very low over the ground, 1m above surface, it frequently adds a horizontal component to erratic flight. Down at a very high speed and with annular changing of wing angle (i.e., [illegible] so that you see flashes of underwing alternating with wing covert. Followed one whiffle till it landed; it then began to preen. (5,11) Estancia Medeland, 35 Km S. of Juncalito by road, Ptdo de Madariaga, Provin de Bs. Aires, Argentina 20 September (see journal morning of 19 Sept). Arrived at (5,11) shortly after 1735 in order to find buffii roosts (see journal today). 1745 First definite buffii, a large [illegible]