J.P. Myers 1974 Tryngite subruficollis (19) Estancia Wedelend, 35 km S. of Jovando by road, Pdo de Malvania, Pcia de Bs. Aires, Argentina 26 September (contd) one stretching its wing almost straight up with them held slightly out from vertical. Hopping up and down. "fighting" - not a high intensity attack but rather kind of a simultaneous hopping. Cup Display - tail held out horizontally. neck up -> tail horizontal the upper tail feathers spread out noticeably creating a bulge beneath the tail. Some of the hopping birds are actually hovering low over the ground. Fighting again, these are 12 birds involved in this tight pack - not all displaying. More than one was hopping. this appears to be a result of the 2-wing up display (drawn above) - when the bird brings its wings down - hard - it lifts off the ground. Also there was a very abbreviated form of flight - flying flitting - 1720 a local supplanting in this vicinity by buffiio. The bird noted at 1711 is still campaigning, there are others. Buffiiio also being supplanted by the territorial Fluvialis around here. 1722 - spooked, flew over toward the roosting area and landed at 1724. 1725 beginning to work back, some flying. Some of them are going on beyond - a group of ~8, whiffing as they pass by here. A group whiffi. They obviously listen to whoo call of Fluvialis - stopping + looking. 1726 - landed in area from which they spooled (12 birds) - the whiffiiffs continued on (1736 - the flock has changed behavior no supplanting, no odd behaviors, etc. just eat, preen. Fluvialis are still territorial. Did the territorial buffiiio go with the whiffiiffs? 1800 - 19 buffiiio in same area as before. Some perching in a patch of Distichlis, the rest foraging in short grass 1820 see flocking accent for detailed buffiiio roosting flights. Many more buffiiio in area than last series was here in evening - it's a group flight that occurs in 1823. A flock approaching want, combining with those already there, flying low over spot (not fast or frantic). Landing, taking off again, during a flug (your notes) - landing, foraging in a radial fashion from the landing area. The landed birds appear to take off when a large group approaches, swirl, and then land again. Mock calling. Flights 1-2.5 m off ground