Image from the Biodiversity Heritage Library.
Contributed by Museum of Vertebrate Zoology, University of California, Berkeley.
| www.biodiversitylibrary.org
Transcription
SP Myers
1973
1974
Calidris melanotos
1974/01
Grid 1 (Farmhouse grid) Puddle Entancio Medland, 35 km S of Sancha by road, Alicia de Bo Arias, Argentina
27 December
(cont)
Immediately the intruder flew again, this time to just off the grid in (4,1). With the supplanted bird followed it, but landing in (4,0). Between the two was an ~ 1m 'channel' of open water without any vegetation, and a low break in the habitat. The behaviour of the intruder changed. For a moment it immediately started to stretch its neck out. They have now been sitting there for four minutes. I interpret this as the supplanted bird having crossed the limits of its territory, and the two birds are sitting on opposite sides of the border 1459 - 8 minutes since arrival and they are still sitting. But now (1459) both chased by trio. The (4,0) bird responded to the first two pairs with a subtle dip of the knees. 1501: after being chased by the trio the (4,0) bird flew to (3,1), then immediately moved to supplant a bird in (3,0). But as it moved towards this intruder the trio came again, causing the intruder to leave, and fly (4,0) bird to go to (4,2) where the original interaction (previous page) had taken place. However in order to avoid the trio attack the bird first had to hit the water flat with a splash. 1501 (4,2) bird (same as (4,0) except?) chasing out of (3,2). Appeared twice, the first - very subtle supplantation in (3,2) with the supplanted bird fleeing in (3,1): Each bird was ~ 1m from stake, on opposite sides. The intruder started they were hassled by the lingering, and had been crowding for ~1 min. Then the bird in (3,2) stood toward (3,2) stake. At that point the fleeing bird stood up + stretched his neck, bill pointed down. The (3,2) bird turned immediately. Then the supplanted bird started to feed + the (3,2) bird headed toward (3,2) -> (3,3) line. (3,1) bird (dark) walking towards it (if - the supplanted bird?) moved about 2 ft, + then the supplanted bird hopped at it. At which pt the supplanted bird went past the (3,2) stake.
Also 30 December
refted in Grid 1 att during early dawn (arrived on grid 0500). Peckers not detected until late in the dawn (0442), well after the circling dawn had become obvious and after hearing CR and Goldens. No Peckers banded, although I walked off a bronze off the net.
1 January
2 Nelson Grid 1 - up by 0415. 6 Peckers secured active snatching bearing first one at 0405. Banded 4 Pectorals: USF+W #2 bands [812-02802 - 05] and other color bands (see banding schedule). Weights ranged between 55 and 71g but unfortunately weights were lost because the tape recorder wasn't on.