S.P. Myers 1979 Calidris fuscicollis 13 April (cont'd) Arrayo Chico, Estancia Medeland, 35 km S of Juancho by road, Pto de Madariaga Picnick Bs. Air, Argentina Difficult to find: the ones that I have seen before they fly are typically within 6' of the water line, nestled down into a old cow-hoof print. Their back coloration does not provide much contrast when seen with the light-like I am using. Wetting efforts were unsuccessful, probably because the head lamp was not sharply enough focused, resulting in the bird seeing light bouncing off my fat as I walked. 15 April tried spot-lighting again, this time with a modified lamp. Also unsuccessful. The lamp probably is not bright enough. Not as many WR found this morning, until 0825, when a flush flew in (I heard it) 0819 while reading subs of linear grid a flock of WR flew over upstream. By Loo dived-squawking against the surface as if to avoid detection. The grid data show an increase in the total # of WR. But nevertheless I was struck by the much greater tightness of the distribution of the birds - they are feeding closer together, tolerating one another. And I saw no sign of territorial interactions - even Ry Loo is starting to stray, being below subs on the running down sample. For several days there had a gut feeling that the territorial system-the dispersion- is breaking down. Today's impression reinforces that. [illegible] 1040 at the end of the grid) above the [illegible] grid fence, I found a flock of 90 foraging WR - staying very close to one another, moving back and forth within a 75m stretch of arrayo. 4 banded birds present: Rply, RyLrg, RoLor, RoLoy. The flock was very spooky, + when approached if split into several smaller flocks of ~30 birds/flock, they going upstream & the other down. I followed the upstream birds. At 1115 collected 3 WR - 131,132,133. Returning down the Arrayo I stopped by Ry Loo and after considerable effort succeeded in reading the USFWS # - it is that corresponding to Ry Loo. I was worried because the bands had faded somewhat so that in some light they had a decided pinkish hue. 18 April read Ry Lp's USFWS # - last digits 36 which chicka. On grid reading this morning, when spiked up more than 1 WR/grid there were always invariably foraging within 1-2 m of one another. Running down total to 96 WR. The resighting today were very interesting: two old-timers, not seen for a while were back. 14 banded WR (4 banded since 12 April) including Ry Lor (laid on 3/13) and Ry Lpo (also 3/13). In addition Ry Lg was in the Arrayo - this is the third foraging area