J.P. Myers 1974 Tryngite subroficollis Tower Llanos, Estancia Medland, 35 km S. of Juancho by road Ata de Ulladariaga, Pcia de Bs Asy, Argentina 7 March collected a solitary buffy (115) at the W end of tower llanos, 1230. 1245 found one flock, fairly tight of 18 buffis near the gate along the S. fence. 20 March found 2 buffer war flock of Thinocones in area E of Tower Llanos Swamp. collected one (116). This bird was a juvenile & weighing an incredible 63.0 g. Fat was the heaviest long sandpiper that I have seen this year. Bursa diagnosis, though mainly involved, unremarkable. 23 March 1145 I finally shifted the buffy flock that has been foraging every sunday near the S. South gate to Tower Llanos. This flock, of ~20 birds, has been foraging there regularly for over one week. Today I collected 3 birds out of the flock (101, 123, 123/124). All three are juvenile &. watching two buffies foraging in (Q2) of 4b, 1830. no sign of aggression between them; inter-ind. distance varying from <2' to several meters; left movement definitely coordinated. They are the only buffie on 4, but there is a flock on grid 7-12 buffies between the drainage ditch and the North path to the South. There were a flock of Oreoplopes and one Terribly. The latter appears to be remaining w/ the buffy. After moving closer to the birds I spotted another small flock of Tryngites - ~8-12 birds. Individuals within the flock are very differently at differing stages of baby molt- or there is at least some variation in the degree of influence of the plumage, as I see both a plainer tawny brown as well as the spring rufous-tinged buffy. The former predominates. It appears (to the eye) bimodal size distribution. Also no sign of territoriality: not only is the flock moving but there is a complete absence of territorial display. 15 April After a fairly thorough search of the llanos I am convinced that there are no buffies here this morning (1030). 16 April 0915 - 3 buffies about 250 m SE from tower foraging within 5m radius of one another. They are the only ones. 29 August We have been at Medland since 23 August and have yet to see a Tryngite. Tower llanos, alas, is fairly plowed. But there remains considerable habitat, particularly since at this time of the year many of the grasslands have the physical properties of a short-grass field.