J.P. Myers 1974 Tryngites subruficollis (19.9) Estancia Medaland, 35 Km S. of Tandil by road, Ptdo. de Madariaga, Pcia. de Bs. Aires, Argentina 26 September (cont'd) see Flock accent re sites of buffii roosting and timing of approaching flight 100+ buffii roosted there, flying in by 1900. I tried to spot light. With the high beam of the Citroen they allowed us to approach within 1.5 m, get a return 1m, but no more. Found many buffii, most in small groups, many solitary individuals. 1 group of 15 in a circle of less than 50 cm diameter. (13.4) Estancia Medaland, Ptdo. de Madariaga, Pcia. de Bs. Aires, Argentina 29 September see flock accent re roosting flights (6.10) Estancia Medaland, Ptdo. de Madariaga, Pcia. de Bs. Aires 30 September see journal re unsuccessful forage - site banding attempt (8.11) Estancia Medaland, Ptdo. de Madariaga, Pcia. de Bs. Aires, Argentina 2 October Marcelo Camuani, Susan Williains, Isabel ?, Lois & I tried mobile netting for roosting Tryngites this evening. Several days ago I had noted a large roost on this wide open field. This evening at sunset (1855) I passed by, noting that several hundred buffii came gathered here, and I recorded their approximate position. Then at 2130 the quintet came out from camp, around 2 20 mints, and began snatching. It was immediately apparent that the birds had shifted since sunset. After ~1 hour of tramping about, each net independent (Lois + I or one, yes other 3 on the other), we came across several flocks of roosting buffii. I immediately went and got the other net crew in order to make a more coordinated effort - some sort of sandwiching operation. However, the buffii eluded us each time - never flying far, but usually at an angle from us. The full moon certainly interfered. The buffii behaviour was indirect: we would hear them flutter (very infrequently call) away in front of the nets usually at a distance of 5-10 m when they flew. Guessing from the length of their wings that we could hear the flutters, I estimate they flew no more than 30 m, usually less. Flights were slow over the ground, and usually in unison (probably too soon to imagine because we could not see the painted flight better). Lois had the distinct impression that they flew in the general direction of the moon. We caught none that evening.