J.P. Myers 1974 Oreopholus ruficollis Tower Llamas, Estancia Medeland, 35 Km S. of Juancho by road, Peto de Medanang, Provincia Bs. As., Arg. 26 April (contd) the feeding behaviour data clearly show that this Oreopholus (4-26-74/01) took several steps after standing while looking for food. Also clear is the fact that it dug for something; the 10 sec spent pecking was actually a digging period, as was the 1 sec peek period. 10 Km E of Tafidel Valle by road, 5800', Pcia de Tucuman, Argentina 8 August a flock of 17 Oreopholus foraging on a heavily cropped (lay horse sheep) grass field near the eastern end of the valley in estancia Tafi del Valle. Sits. Only other birds present on the field were Vanellus chilensis and V. capellanus, as well as Muscisaxicola caprata. Although hectares of similar habitat were available to the Oreopholus, they remained in a tight flock (spaced over ~100 m²) in an area where none of the other 3 spp were present. Foraging technique appeared identical to that which I have described on Medeland. 20 Km S. of Diamante by road, Pcia de Entre Rios, Argentina 12 August flock of 150+ Oreopholus foraging on a short grass (>1" high) and thistle field. Topography is a gentle roll which appears to be characteristic of this area. Beside the Oreopholus, there were 3 Vanellus, many Lessonia rufa, a few Geositta, several [illegible] Polyborus, and 3 Nothura maculosa. Field grazed by cattle. 22 Km N. of Gualeguay, Pcia de Entre Rios Argentina 13 August 100+ Oreopholus feeding on a very short grass field by the road. The field is incredibly dense in cow pie, but I haven't seen any O's using them. I am struck by the utter lack of aquaerium in foraging Oreopholus. Birds cut within a foot of one another, going 'across the row', and there is no call, no obvious threat, definitely no overt aggression. Groups of 3 or 4 appear to work together, going across the field in the same general direction, first one feeding, then as it stops to peck, another underneath. The only thing disturbing this sequence here today is the occasional attack of a Vanellus, at which point the small group flies off callery.