S Phillips 1980 Calidris melanotos NARL, Barrow, Alaska 2 July (cont'd) Can also be observed with parallel border flutter flights. No vocalizations given during this interaction. Border Fights - Often one or both 87 gets very erect + they face head on. You then see a striking pattern of black & white because of contracting chest and belly with tail fanned. During the fight they grapple viciously, crouch, then spring again to the fray. Tail is fanned (at least it is when they're moving slowly enough.) Sometimes only one has tail fanned. One bird constantly seems to try to get on top of the other + then jab it in the back of the head or grab its feathers. There rarely is a clear cut winner. Ends as one heads off toward territory. No noise other than wings striking. Border Swoop - Dovetail a single 87, possibly someone who has been cherry a treasure through his neat + reaches the boundary. He swoops around in an arc 20-50 m - 100 m long neck withdrawn → outside of territory exposes underside to neighbor Usually occurs more or less at boundary but will go farther, sometimes by 50 m. Myers has detailed this in previous years accounts (1976?) 87-87 Chase - a very distinctive low flight - very rapid wing beat somewhat shallow. There is a noticeable chestnut to his profile. Much like portion of Tryngite in border patrol flight. "a 'burniness'" This flight is also used as he tails off in pursuit of 87-9 chasers. Wing-ups w/ 88? Very rare. Used in context of aggression. See M. Calkins's note 1979 and 1980 (28 June) - [also something like a Calpinna wing fold (24 June 1980)] → Flapped undulating at other 87 30 m away, held 7 sec.