J.P. Myers 1974 Zonibyx modestus Punta Raga, 15 Km W of San Clemente del Tuyu by road, Pico de Guadalupe, Provincia de Bs. Aires, Argentina 28 March 1974 1659- the 10 min after tide began going out - a winter plumage Zonibyx showed up in a shed bay beach and flat along with sandpipers, whimbrels, and Ch. Falklandicus . the sup strip standard, not so much in color (very muted) but in relief. (But retain some of the rufous color of breeding) but has definitely gone towards basic considerably. the feeding style very similar to recent tempo + topography to that of a golden plover: it holds still for a few seconds, standing upright, takes 3 or 4 - 5,6,7 steps (something like that), stops, falls another step or 2, leans over just at something. Frequently the gulls consist of more than one still motion. Ch. falklandicus aggressively against the Zonibyx, which was displaced. Arroyo Chico, Estancia Medeland, 35 Km S. of Juancho by road, Pico de Madariaga, Provincia de Bs. Aires, Argentina (did not mention that 25 March saw a probable Zonibyx on the Estancia) 1 Zonibyx in Arroyo foraging with WR + Ch. falklandicus. Picked up one in "running down" totals: they have an obviously different way of flying from either of the other 2 small shorebirds here, and their silhouette while foraging- extended neck, stance etc., are unmistakable. Shows much more dark on rump in flight than falklandicus. 11 April more Zonibyx in Arroyo (see grid totals today + 4/4.) 1300- found flock of 10 Zonibyx in a mix flock of other shorebirds, Orypholus and Tryngite. 1830 - a Zonibyx upland on grid 7 traveling briefly with a very tight flock of buffle. SCRATCHES OVER WING, like Charadrius. Tower Llanos, Estancia Medeland, Pico de Madariaga, Provincia de Bs. Aires, Argentina 18 April am seeing Zonibyx regularly upland now - a few solitary but more frequently in flocks. 1020 - indication that the flock may contain a territorial bird: some chasing by an individual at several others, over distance not accounted for - individual space. Part of a flock of 8 Zonibyx doing so; others probably not. 20 April - a Zonibyx briefly chased by Vanellus in the very trampy terrain by the gate at Tower Llanos. 1805 - Vanellus chasing Zonibyx in Arroyo 22 April resightings on landed Zonibyx! both birds were foraging separately, one between 7+6 and the other on 7. Much Zonibyx intra + inter sp. aggression along the arroyo this morning during the grid reading.