Argentina field notes, v1505
Page 541
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Transcription
J.P. Myers 1974 Journal (B.11) Estancia Mcdaland, 55 Km S of Juncal hoy road, Pto de Madaniaga, Provincia de Bs As, Argentina # buffalo flying / to units, period 6 November (cant) the resultant figure shows a peak at buffy overflying flights at 1900-1940, rising smoothly beginning at 1820 but dropping sharply after until 1920. Golden, on the other hand, are much more spread out, and in fact show 2 peaks - 1910-1920 and 1930-1940. Both species retained approximately the same relationship between period of peak movement and times at which the sun set (when compared to 10-18-74 data): buffies peaked 20-30 minutes before sunset whereas golden were moving around sunset. (12.19) Estancia Mcdaland, Pto de Gral J. Madaniaga, Provincia de Bs. Aires, Argentina: 7 November Before sunrise drove to the newly placed quasi-grid upland from subunit 6-7 of the linear grid in Arroyo Chico. Called grid #18 (grid 18 is placed in typical upland short-grasslanded in a field bordered on the west by the Arroyo and the east by a lower area of Dactylis). The gridded area is 50m x 50m, and was placed in order to allow a calculation of 90% buffalo buffies. Then, adequate stakes were placed so as to allow an observer to visualize the limits of the area and to provide scale. When I arrived at 0520, I found that almost 50% of the stakes (placed 4th Nov) had been pulled. I therefore had to replace them, and while doing so saw the morning influx of buffies. Unfortunately, they saw me, as well, and things never returned to normal. I remained until ~0815, but then left when it was overly apparent that I was to continue to be a disturbing influence. The flock spooked several times, were very ragged, and never consistent in their space relations, although several times it looked as if they were going to settle down. From the observation post (in the blind atop the car) I could see territorial supplementation by Trypophorus further out (far out?). Meanwhile, The sun came above the horizon this am. at 0537. Temperature = 11°C. Slight E. wind developing and steadied by 0800 and swinging to the west (cloud cover ~80%). Sea buffie sporecent Linear grid Estancia Mcdaland, Pto de Gral J. Madaniaga, Provincia de Bs Aires, Argentina 8 November After placing the padded-up blind again atop the car we drove to the linear grid, beginning to sample at 0903. Temperature this morning at 0530 = 8°C, at 0900 = 17°C. Wind light E. Clouds = 40%. The arroyo this morning had flowed to a bare trickle, in some places about stopped, less than 1m across and ~2cm deep. Then? As a result [illegible] and in