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Transcription
J.P. Myers
1974
Journal
(11.10) Estancia Medaland, 35 km S. of Tandil by road, Pto de Madariaga, Provincia de Buenos Aires, Argentina
Schedule). During the evening a moderate - strong N wind continued. Temperature dropped to 4/3 °C.
Very few clouds, all on the S. part of the horizon. Sunset at 1857 or so, perhaps as late as 1900.
(11.9) region, Estancia Medaland, Pto de Madariaga, Provincia de Bs. Aires, Argentina
On tower at 0545, temperature 13°, slight S-SE wind, clouds 20% and increasing rapidly.
I remained on the tower until 1145, taking grid samples from 16a ad 16b,
and following data for buffets and goldens - the story of the morning, unfortunately, was the
scarcity of Tryngita - depressingly few near the tower or populating my grids. In absolute
terms, in the 1/18 region as a whole, buffets are not scarce; at any given moment I could count 100-
200 within a 250 m radius of the tower. But in the immediate vicinity, i.e. on the grids,
very few grazed one of their presence. Grid totals: 16a (64 samples) Tryngita 0.13 (0-2)9;
Pluvialis dominica (39 samples - will explain discrepancy later) 1.1 (0-3)42);
Grid 16b Tryngita (42 samples) 0.6 (0-4)25; Pluvialis (17 samples) 0.6 (0-2)11.
The discrepancy in sample number results from the fact that I was able to reconstruct 27 hours of
5 minute samples from following data in which I was able to record minute by minute
position of all buffets on the grids (only because there were very many). Others,
while doing this ignore Pluvialis position. What is not reflected in the grid totals nor the raw
data is the general pattern of foraging exhibited by the small group of Tryngita here this 4 a.m.
see flocking accent. We also took following data on 2 Pluvialis, one of which
[illegible] demonstrated classic space-specific [illegible] behaviour (see 16a following data book).
With respect to the tower: it is placed ~75 m from the edge of a rise which runs
in a NE-SW direction along the western boundary of the Estancia in 1/18. Otherwise
I described the area in previous journal entries beginning 13 and 17 October 1973
4 September 1974 and others, a cross-section :
[hand-drawn sketch with labels: E, N 3-5 m rise, tower, 1 km, grid, slight rise, fence, road, short grass, grazed ≤2 cm high, pond extending out of page]