J P Myers 1974 Flocks (11) (a) Estancia Medaland 35 km S. of Juncho by road Ptdo di Madrelego, Avia de Bs. Aires, Argentina 13 October (cont'd) a small group of roosting golden which could not have been these cantior because we flown directly over their roosting position. So on a cloudy days, golden come into their roost after dark. 14 October arrived in 11:00 at [illegible] 1840, too late to make any meaningful counts. However, we easily located the several roosting buffy flocks, in approximately the same positions as yesterday, although the main area may have shifted 100m or so to the N. Paired ~50 cm from a smaller flock, and attacked them first with light + net once it was dusk enough (see jour) first approach was from upwind, which was probably a mistake. The birds were obviously blinded, but seemed to be relying cueing on my auditory production and especially on the sound of their neighbors following away. The buffies were roosting on the ground, generally (but not invariably), in shallow depressions. Many were simply in the open on exposed dirt, frequently near + downwind from bits of vegetation. They were markedly clumped, often as close as 10-20cm from one another in small groups of 3-6-10. Occasionally when birds spotted because of the light, some remained. [illegible] Once I heard this whenever one would fly as I wandered about I would search the area very carefully from whence it flew, and usually find more flocks. They flew towards me, irrespective of the wind. One actually hit my net as it flew over (I began holding it up as soon as they started taking off.) The two buffy flocks which I found were spread over ~20 x 10m and 50 x 20, respectively. I found one golden flock near the first buffy flock. Interestingly, individuals here were much more spaced than roosting buffies. I never saw a golden closer than 1m to the next, and they were usually 2-3 m apart. They were also much more visible than the buffies, mostly because of size + color. None of the roosting sites used here to night possessed the contorted topography of previously seen site (which had been frampled by cattle (see 26 September)). This may be important in causing the much greater spacing between golden tonight as opposed to those other nights. The two species roosted in separate flocks.