JPNyiers 1973 Journal 14 Km 300 W of Villa Hayes at Retiro on Eaton's Ranch 1 Km NE of trans- chaco highway, Dept. Pres. Hayes, Paraguay Aug29 cont'd camp (3:45 pm). While I was at the car getting equipment to go out, Phil said that he saw another (or the same) flock flying in the opposite direction, and others to the north near the lagoon. He said they were not yellowlegs. Lois and I went out; we followed the S side of the lagoon to the S going all the way around (several hundred meters to the end of the lagoon from the camp), then back up the other side until it curves off to the east. At a point less than 100 m past the place where the lagoon curves east, we found a crossing, and worked back to the camp along the W shore, headed south. Mudflats are located only in a few places NW of the retiro. The most extensive series of mudflats are at the point where the northern end of the lagoon curves to the east, and for some distance (150 yds) to the S from that end. Both sides (E+W) have mud. It is here that we found the shorebird landed. I could not get a very good look at them, but enough to see that there were at least 3 species (6 yellowlegs + 2 small), and that I would need the scope. By this time clouds were coming out of the west, + the sun was setting. Wind light. The birds were too spooky to be collected. Also seen in the marsh (+ relevant to shorebird): many jacanas, several pairs of terso terns, kiskadees, vermillion-crowned flycatchers. Also louisiana heron, giant wood rail, guira cuckoo, monk parakeets, whistling heron, maguari stork, vermillion flycatcher, white- necked heron, smooth billed ani, etc. Will make a detailed survey.