JPMyers 1974 Journal Tower Llanos, Estancia Medland, 35 kms. of Juncalco by road, Ptdo de Madariaga, Provincia de Buenos Aires, Argentina March (Cont'd) After completing the linear grid survey we drove out into Tower Llanos. First, we went to the swamp at the E end, and tromped within it for ~1.5 hr. At least 100 or percent, as well as a small flock of 6Y/legs, ~20 LYC at most, a few BNU still, and perhaps as many as 30 (or more) Nycticebus seen! The swamp has dried considerably in the last 2 weeks, with several areas that had over 1" of water then, now passable by foot with only a shallow footprint left in the mud. One large body of water remained I suspect that its 1" depth will hold out for several more weeks. Coscoroba swan, royal pheasant, etc. No grebes. After leaving the swamp we went over the Plains looking for Tryngite and Thinoconus, finding 19 and 25, respectively, the latter in the largest group that we've seen due to date. Collected one buffy (115). 20 March Rte 11 Pond, Estancia Medland, Ptdo de Madariaga, Provincia de Bs. Aires, Argentina Passed by Rte 11 Pool at 0945 en route to Tower Llanos from a morning off the Estancia getting a fire patched. Dawn was foggy, 14°C, with a solid bank of clouds along the eastern horizon. By 0800 a mild N wind was up. At 0945 cloud cover had reached 50%, but it was of the benign puffy small cumulus type. Anyway, there was a small flock of Pectoralis (7 total) on the ponds, foraging near the road on the S.S. side. Arroyo Chico, Estancia Medland, Ptdo de Madariaga, Provincia de Buenos Aires, Argentina 1045 began reading linear grid at Subunit 1. Temp-22°, 8byclouds 30%, wind moderate out of the North. Within the last 3 days the Arroyo has become drier, water level falling 2", so that now it is in places less than 5 m wide. In several specific locations the change is quite dramatic, and especially so for the W.R. Drainage, because they are shallow flats barely covered before. Now they are dry, or almost so. Subunit 4 and Subunit 10 are particularly affected by this most recent drop in water level. White crump numbers are done accordingly (or more so) totals: White-crump 83,9(7/4).