JPMyers 1943 Journal 10 Km NE of Mephy, at Laguna los Iternaldes, Proia de Santa Fe Argentina 23 September 60s and I went with MRumboll, Otto E Hohn, and Edward Shaw to LosHernaldes, a large marsh-lagoon where Hohn is studying black-headed ducks. @ the day was clear, windy, and warm (60's). We went to a ranch at the east side of the lagoon in order to get a boat, then spent 2 hrs rowing west through past a tick swamp (filled with nesting white-faced ibis, brown headed gulls, coy billed pochards, great, red-billed, and co's rolland's grike etc) in order to reach an island in the center. On the way we collected 3 black- headed ducks. On the island there is a house (abandoned), a coral, water trough, and a small group of horses. Here we found white-cumped , Piedbald , and perhaps a few Baird's sandpipers, as well as greater+ lesser ylegs, Wilson's phalarope, and many nesting black-necked stilts. I watched the pipers for a short time (before trying to collect (at which point they uncooperatively flew away). For the amount of habitat present there was a disappointingly small number of birds present. This had proved to be the case the day before, which we spent visiting a large number of marshes in the Venado Tuerto area, none of which contained any sandpipers (although there were a few ylegs). According to NVE this is generally true for that area. Certainly remarkable, after all that we had seen the weekend before at Calo San Antonio, was the lack of any Golden Plover. At LosHernaldes we saw a number of nutria floating in the seen on top of tide raft in the middle of the this colony.