Sullivan 1978 Calidris maritima NAUL, Barrow, N. Slope Borough, Alaska 18 June may simply be affecting staff. PF also present for a brief period during the beginning of the tracking session of the bird, which could be picking up display activity. Pitka, Shuford + McCaffrey all recorded higher maritima activity yesterday around the previous grids as I was at Whale River. Today & concern. Further, many partially developed TOs are still moving about. The only flying lacking are an abundance of PF. The 3 birds I tracked today (6/18/78 - 1, 3 & 4) were all displaying actively, largely in border display + 8-8 chases. Floaters intruded regularly. ~1700 tracking 6/18/78-4. DT just engaged 1978-7 (which Dave Shuford is tracking simultaneously) within a border dispute, first 11 flutter flight then 11 border march followed by direct + violent grappling with bill + claws. battering on another w/ wrap out + tail fanned. The border march involves each of the birds running forward several (5-10) paces with neck down, then raising it up [sketches of bird movements:] pounce [illegible] tail fanned [illegible] drawing [illegible] repeatedly, wings slightly lowered out of covering, prepared to strike. As one of these birds runs forward, the other may do so also, usually separated by ~20 cm when running. Often they alternate, one running + then the other. Other times both of them go slowly. But they go through a series of these run, back + forth, then take off in a 11 border flight; the fluttering variety, feet dragging slightly + tail fanned, flying along the border line. They may do this for 5-50 m, 1-3 cm off the ground, usually 1-2 m apart in the air, sometimes closer. Chest is hanging and inflated when they fly, back feathers raised in 11 border march. On the masks they point under the neck, in a side head splay. 19 June See TAPE LOG for notes on vocal display this aim SEE Dave Shuford's notes re NESTING DISPLAY