JPHuyers 1976 Journal GRID 3, Barrow, Alaska 1 July tracked a ♂ from 0735-0945. It was active, but not excessively so, having one border confrontation and being supplemented once as it intruded into a neighbor's territory. Two ♀ were present, one with chicks (not found but strongly indicated by behavior of ♂) and one ♀ which may have been w/o a nest - she was not responding overly negatively to the ♂'s advances. Perhaps it is the ♀ from PS nest 1 on grid 3, which appears to have been lost to predation since 3 days ago. After tracking I returned to the grids w/ a nest group in order to band ♀♀ - but it was soon apparent that a flush of hatching had occurred. In fact of 4 nests checked on grid 3, all were w/o eggs, and of these only one (PS2) appeared to be w/o result from predators, as it still had egg shells. (Grid 2), however, appears to be running behind ♂3, with more of its ♀♀ hatched. (Band 3 - see banding schedule). Whether this morning remained overcast, temp ~38°, with a moderate (wse) wind. Snowed in fluvius intermittently. Ross Greenberg covered transects 1,3,5 yesterday, and 2,4 today. See transect account for details. Overall summary follows: 50ha. 270 minutes TRANSECTS 1-5 no. density(/ha) Polysticta stelleri 4 .08 PS chasers 9 .03/minute Phuvialis dominica 3 .06 Calidris alpina 14 .28 C. melanotos ♂ 19 .38 ♀ 19 .38 C. pusilla 3 .06 Ph. folicarius ♂ 16 .32 ♀ 68 1.36 Limnodromus scolopaceus 4 .08 Stercorarius pom. 2 .04 Nycticora scandiaca 2 .04 Calcarius lapponicus 14 .28 Plectrophenax nivalis 3 .06 the densities of some species are obviously high. For example - a pectoral ♂ density of .38 hasn't possible given known territory sizes of [illegible] hectares / territory, even though it is not far off. The reason for this inflation has to do with our method of censusing, which includes counting displaying ♂♂ when displaying over a unit. Thus, species which engage in aerial flight displays may be overestimated. Further, it may also be true that birds