SP Myers 1974 Calidris fuscicollis 7 March (cont.) Arraigo Chico, Estancia Wredeland, 35 km S of Torniho by road, Pto de Madariaga, Provincia Buenos Aires, Argentina the intruders or had landed, or it was not within seconds after they did. Is there some landing call? Mouth of Canal 7 into Mar Chiquita, 21 km N of Mar Chiquita by road, Pto de Mar Chiquita, Provincia Buenos Aires, Argentina 8 March Beceler found flock of 500 WR in mouth of canal foraging over broad (300 m x 200 m at least) shallow (≤2") mud flat. Most of the birds are very densely spaced, although near the periphery, along the shoreline, they appear to space out a bit. Not spooky (till I started shooting). Collected 10: [illegible] 94-105, 108. Almost all of the birds had a small reddish gumbus in their mouths & throats, the worms were less than 20 mm x 8 mm. I collected a small container full, as the throats of the dead WR were literally overflowing with the worms. All but one of the WR were pmm - with 5 of the 8 having definite, large bursa. The other 3 others were questionable - either lacking a bursa, or it being almost entirely involuted. I am not satisfied with my ability to detect the spiculum in the dorsal wall of the cloaca. One appeared to be a definite pad. The 8th was questionable. Interestingly, of these 3 that were questionable tended to have larger ovaries with ova that were beginning to differentiate. Arraigo Chico, Estancia Wredeland, Pto de Madariaga, Provincia Buenos Aires, Argentina 11 March 0745 Two small flocks of WR at curve in Arraigo below tower. One banded bird, Rplv. One sticky thing about these birds is the number that are bathing already! and it is just after dawn! Reading the linear grid and picked up an unusually large & compact flock for early morning hours on subunit 6 - the bulk of this flock, 12 birds, settled in 4 sub-units. There were no bards among them. However, total for the sample was typical - 29 birds. Then returning along the Arraigo between subunits 5 & 4, in fact at the N end of Rplv's old territory, I picked up another flock at 0930, this time of 32 birds. One of these was Rplv, already found this morning below subunit 7. Rplv had never been this high on the grid before, usually him found only at or below subunit 11. Miller had not formed such a large & compact flock. It would therefore appear that these birds are in some state of flux, be it a change in feeding area or some premigratory activity. The total WR found was unusually high - 139 birds, relatively normal except for the 200 bird flock of Rplv. 14 banded WR found. However