JPHayers 1975 06 Calidris maranotos Grid 2. Adjacent to Smithsonian Bldg., 4 km S. of NAPL, Pt. Barrow, Alaska swinging of head from → thro → new posture - following a period of active rip down + drag out fighting one 0° (6/18/75) stood upright facing opponent ~30 cm distant and spread wings with wrists being most elavated parts + tips pointing to ground. An incipient cup (buffic) display? head should be up forw feathers of other bird in all back feathers raised → tail fanned wings not spread quite so much as indicated here other bird standing, erect but w/o wings out. Grid 3 21 June 1630 - 2 0° in border fight, have been marching parallel for 4 min., # paeny 2-3 m in one direction then turning + going back. ## maintaining distance between each other of 50 cm.-1 m. If you 'fall behind' it flares up, passing other bird slightly. I have seen a pair of wings spread business (above) but just briefly, at end of flapping forward when they seem to be some sort of balance-related behavior - feathered at, sometimes touching ground. Body today has not been erect as 19 June but rather horizontal. During parallel marching the tail is depressed. 23 June 12:20 as pectoralis bank in flight after chasing intruder out of territory then as a characteristic posture in flight with outside covering up and exposed. must be a display of underwing in flight. See journal re # of 0° around this a.m. following 0° [6/23/75-2] this afternoon only?75: see following accent: this bird left territory several times in aerial chase, going as far as 200 m outside of area in the process. Much of its time was spent either in chase or alit. No I observed with it.