5P Myers 1974 Journal Mouth of Canal Tisbo Laguna Mar Chiquita, 21 Km N of Mar Chiquita by road, Ptdo de Mar Chiquita, Provincia de Buenos Aires, Argentina 2 April (cont'd) At the mouth of Lesser Channel we placed a strip of stakes 25 m apart forming a strip of 4 25 x 25 m units. After completing this we walked to the N edge of Skimmer Island, after which Lois returned to camp and I continued N along the shore, reaching the higher land + mud bank noted on the map just at sunset. It was only late 21 March were the majority of the 5000+ WR had been foraging this evening, with the exposed mud extending only 25 m out from shore, thus considerably fewer WR present, perhaps 500-1000 about mud bank. I returned to camp, cutting across the shallows to Skimmer Island, returning via Lesser Channel, arriving at 2015. See WR apparent. 3 April placed out at mouth of Lesser Channel in closest grid unit at 0615. Slight WNW wind, 0% clouds, 19°C. As we came out onto the mud we found several Himantopus h. and one Nycticorax. ☀ Sun lit horizon 0805. By 0850 light level was beginning to change, + at 0900 Tringa began to filter into area. WR flooded till 0415, + non approved net area until 0750. Water out considerably - the outer- most grid unit last evening had 1"+ of H2O - this morning it is wet mud. The WR appearing to respond to the lowered water, were first seen in a large, very dense band at the water edge, not very far inland from the break in bottom type (see 2 April map). Small bands of them left the main flock at varying intervals, trickling closer + closer to land. We eventually closed 6 WR + 1 Ch. Falco tinnunculus into the net. Filled it at 0845, after which they began to avoid it effectively. Returned to mud flat at 1030, sat down on edge of vegetation, and observed WR's until 1300. I took an extensive series of observations on the new dispersion of the WR within solanit 1 of the grid placed yesterday. (Like one in WR apparent). Through the morning the weather remained similar to that described earlier except that the wind gradually shifted to SW. Clouds 0%. No new species seen. A large % of WR present within the area close to my observation post were territorial or partially so. 1400 returned again to mud flat, this time Lois used my observation post in order to get independent interpretation of what the WR were doing. In turn, I sat where she had been this morning and photographed kindred interaction. Wind picked up, as did cloud cover, which grew to 20% puffy cumulus. At 1510 however, a load of roughly semi-dunk, and armed Aracutus appeared at the marsh + began shuffling. We left. 50 WR apparent.