JPVilliers 1974 Calidris fuscicollis Arroyo Chico, Estancia Miedeland, 35 Km S. of Juancho by road, Pte de Madariaga, Provincia de Buenos Aires, Argentina 23 March (cont'd) flew again, landing within 2' of Rylgr, + both birds entered a crouch. I could see Rylgr's white wings quite clearly from my vantage point, and lowered the wings off the tail (the tail was down as well). This posture position was held for 4 sec., after which 3/23 A jumped at Rylgr, which went deeper into the crouch. 3/23 distanced from its attack, re-entered into a crouch, but started pecking at the ground almost immediately, Rylgr then fled away (back to W). Rylgr left crouch when 3/23 A reached a point ~30m away. Rylgr fled with tail down for over a minute afterwards, as 3/23 A continued working W. 0945 - watching a group of 12 WR foraging along a stretch of the Arroyo S of Rylgr. The topography here is somewhat more complex, with 2 dead ends of the Arroyo forming an X. (See sketch). Both of these bends are territorial, with at most 5 non. Circled #3 on the grid show how the territories are placed with respect to the arms of the X. The non-territorial birds have tried to forage several times in the centre of the area, particularly when the ... are... When they enter this area, they are given no peace, with residents persistently chasing them off, frequently from one territory to another, so that there are 3 or 4 supplantations in succession. The non-territorial birds persist air-flying back into the central area, only to be chased incessantly. Intrusions have been solitary, but more often than not 2 or 3 birds go together. 1045 - after watching 4 non-territorial birds for 20 minutes as they worked up the Arroyo in an area just N of Rylgr I collected two of them (120,121). Punta Raze, 15 km N. of San Clemente del Tuyu by road, Pte de Gualan Valle, Provincia de Bs Aires, Argentina 28 March 1650 - first WR after tide began falling at 1555. A more within 2 minutes. All WR seen have come in from the E. 1659: the WR are approaching the tidal zone in small groups, nothing larger than a flock of 6 so far. They are also dispersed along the habitat. 1720 - a flock of 8 WR along a 10 m stretch of exposed mud flat. They are the only birds for 20-30 m. Shows the paucity of WR. 1752: numbers of WR is still not overwhelming, 2 hours after tide began going out. Perhaps 150 WR. 1755 - WR are flying between areas where other WR are foraging in flocks of 2-3 birds, never more than 5. Few that I noticed unharmed suggesting territoriality. However, there do appear to be a few. Rattleback in Channel (see journal) when the branch so steep. [illegible]