J.P. Myers 1974 08 Calidris bairdi (10,13) Arroyo Chico, Estancia Medeland, 35 Km S. of Juanneko by road, Ptd de Madariaga, Pcia de Bs. Aires, Arg. Feature equally important to distance (i.e. interacting with) appears to be orientation—gather parallel except parallels. "Don't show your face to your neighbor." several times in the last 2 minutes I observed them feeding very close together sans/aggression—parallel. Then as one turns to the side (toward another) the one which is turned towards all react. Foraging style: puffing bill in till calmen reaches water surface, pull up until tip is out. "I see in each phase. up-down... we running after another. then the one that went ahead went and [illegible] skirled around a bairdi's: [sketch] it described a 6" diameter half circle around the feeding bairdi. The parallel business is not invariable, but fairly consistent. bairdis runs to a foraging spot and then turns so as to orient parallel to neighbors, not necessarily upwind (but usually so). @1834 - all looking up. (3 fallerlandiis flew in) 1838 block moved 20m upstream, split/lay into 3 groups on 3 corners of a triangle [sketch] 6 are bathing in group one, 4 settled into lymcinio in mad air 2nd group, 8 in 3rd (6 feeding, 1 preening). 1843 Group (and 3 very alert. I can't see group 2. not much stretched; they're just sitting, turning their head from side to side. 1845 They took off, heading directly forward Tower Llanos Swamp. I couldn't follow them for very far because they flew only a meter or so off the ground + the light level 25-3 foot candles. (9,18) region, Estancia Medeland, Ptd de Madariaga, Pcia de Bs. Aires, Argentina solitary bairdi's landed in (2,19) at 0719. foraging, (2,13) La Orqueta, 35 Km S. of Juanneko by road, Ptd de Madariaga, Recinto Bs. Aires, Arg. only 3 bairdiis at La Orqueta. see journal