Image from the Biodiversity Heritage Library.
Contributed by Museum of Vertebrate Zoology, University of California, Berkeley.
| www.biodiversitylibrary.org
Transcription
JPMyers
1973
Journal
Farmhouse pond (Grid 1), Estancia Medland, 35 km S of Juancho by road, Pcia de B.A., Argentina
it almost continuously for the entire observation period (see fott and table following data at min. intervals).
It may be that the pond has been totally exploited for its food resources—or at least to such an
extent that other feeding areas are now more profitable. Along this line, it is obvious that the
pond has dried considerably even since we put in stakes. Perhaps concurrent drying of other areas
has exposed new [illegible]. Whatever the cause, the birds are not here in the numbers that they
were when we decided to grid the area. Unless this changes, I see little point in continuing
to work Grid 1.
Windmill campsite, 2 km N of farmhouse, Est. Medland, Pcia de B.A., Argentina.
Returned to due after abandoning Grid 1. We had not been due for over 24 hours because of the
different campsite last night and yesterday's trip to Mar del Plata. My funnel trap, placed in the
field near the camp where goldene feeds night and buffaloes roost in the evening, has been destroyed by
[illegible]. They have proven to be a nuisance. Not only do they behave unpredictably when confronted in
the fields—usually scaring birds—but for e.g. they come and rub their heads against the car
while I'm sitting on top, and have destroyed many stakes in both grids (by eating (?) and by
scratching Zonotrichia feeding juvenile). At 1100 we started back toward the Farmhouse.
En route, it began to rain hard.
Farmhouse Eucalyptus grove, Est. Medland, Pcia de B.A., Argentina
We set up camp within the grove so that I could cut stakes and have a shelter to retreat to
during rain. I used the shelter most of the afternoon, because of continuous rain. By
2000 it had rained 60 mm (Huici has a rain gauge). Wind by 1000 had swung to
ESE, and was very strong—branches in Eucalyptus blowing down. Around 1900 there
was a hiatus in the rain, and I made a cursory exploration of the grove. It is less than
500 m x 500 m, largely Eucalypts with [illegible] poplar along the Sand E borders.
There are several species of birds within the grove that I never see on the grasslands,
as well as species nesting in here which forage out in the open. It would be very
interesting to compare avifauna in Eucalypt stands here with those in US, especially
as far as how they divide up the resources. I will provide a complete list of