J.P. Myers 1974 Journal Arraio Chico, Estancia Medland, 35 Km S. of Jujuy, by road, Pte de Madariaga, Pcia de Buenos Aires, Argentina 22 February (cont'd) Charadrius falklandicus 7(0-2)4; Black-backed Stilt 0.25(0-1)1. Sky was clear, temp=15°; light extremely low (<10 ft-candles), the sun having at almost 0.5 hrs. previously (see WR spec. acct). 23 February Banding at subunit #5 of linear grid, and grid #3, in Arraio Chico this morning before dawn. WR arrived: there was a low fog covering much of the llanos + thundery-in patches in the Arraio. Fogged But less than 10 m up, stars were readily perceptible through the mist. WR arrival at 0642 — this was ~10 min after I began hearing GY leg and Charadrius falklandicus. Banded 13 WR and 4 Ch. falklandicus. [illegible] Tower Llanos Swamp, Estancia Medland, Pte de Madariaga, Pcia de Buenos Aires, Argentina Spent afternoon asconced in blind in swamp where I left it yesterday. Despite the limited visibility from the blind, I recorded #s of shorebirds (details) during half-hour time periods, until it became apparent that the birds were still not habituated to the blind. Total: 103 — White rump GY leg LY leg Muscovian — a noteworthy item — today fluarea hundreds of cliff swallows first seen for months, with a prominent W component in the species sector of movement. 1630-1700 12 3 3 1700-1730 16 0 2 1730-1800 52 10 14 1800-1830 12 1 0 These numbers must be viewed as crude, as I was most dependent upon ears, + deriving #s from memory not at all straightforward. Nonetheless.... One banded bird Rn Lg. 24 February Arraio Chico, Estancia Medland, Pte de Madariaga, Pcia de Buenos Aires, Argentina Reached subunit #1 of linear grid at 0745. Temp=12.5°C. W/L = 65 ft. wind = 0; clouds = 0%. En route we saw buffalo on Tower Llanos, including a flock of ~20 in the vicinity of Tower Blanca and Gvid 9. Also 8-10 rheas on the llanos. After attempting one run of the linear grid sample, the procedure is as follows: Beginning at subunit #1, at the south end of the linear grid, we stop at standard observation points on the bank above the arraio at a point in the middle of each subunit. Each subunit is 100 m long, with 27 stakes @ 5m intervals (20 units). On the opposite side (West) of the Arraio, are 3 stakes one each opposite East stake 0, 10 and 20, thus dividing the W side into 2 50 m units. Position of all stakes on both sides of the Arraio