J P Myers 1994 Journal Estancia Mcdaland, 35 Km S. of Juan duo by road, Ptdo de Madariaga, Proia de Bs. Aires, Argentina 26 August (cont'd) traveling along the fence from Arroyo Chico SE to Gate C (see map) I noticed (now that the vegetation is low) that there is a slight roll to the land, here. It is no more than 1-2 m variation with a periodicity of ~ 1 cycle / 150 m. But it creates (or is correlated with) regular variation in grass type. In the bottomlands are a thicker grass (Distachlis) whereas on top is a bermuda-type contaminated with dead weeds. The shorebirds (same Vanellus) are exclusively in the upper areas on the short grass. This includes Orcopelopus, Zonibyx, Charadrius falklandicus, and Calidris brachydactyla, and Gallinago gallinago. Vanellus is everywhere. cross section of topography upland shorebirds drought grass Distachlis 150 m 27 August arrived at subunit 10 of linear grid 0545 for banding. en route between subunits 7+8 I spot lighted a falklandicus + netted w/ butterfly net, banded (it turned out to be lump B - see spacer) This morning I used a new pair of blitz 7x60 trapline nets which were DISASTERS - The two ends are of different widths (both ~5") and narrower than the center. The netting is unevenly distributed along the length, and tied in place that way. Anyway... pega didn't appear until 06:50, and then <10. Noted O. By coordinate system (see map 23 August) The netting site was (13,24) and the falklandicus were picked up in (13,20). If that isn't science..... Collected 2 wr returning along Arroyo in (13,18) Wontur coel (12E), no wind, 100% overcast occurring from a thick all night fog. during mid morning and early afternoon we drove along the route taken 8-26 to the NNE from the Farmhouse camp. We went as far as (28,23) [see grid on 8-23 map], and parked there as I walked 200 m NW through a marsh. During the outing it began to rain lightly but steadily, a wind developing out of the south and the cloud cover lowering considerably. The swamp seemed to be extensive with alternation (broad flooded grasslands [with treaderous + given an extraordinary amount of micro-relief by livestock grazing] with some Solanum, partially flooded like mostly just muddy Spartina, and full Hedged Tule Tule swamps - One Chamaetopogon nest