P. De Benedich's 1965 Calidris pusillus 7 July Barrow, Alaska - as did males in the early spring, leading me to suspect it was of a recently established pair. The whole picture was complicated because it + another (2 others, one the 07/Post 8) P displayed together (to each other) on several occasions, and a 1P aerial display was seen on one occasion. See July 4. These "upstart Ps" have greatly troubled the 07 to Nest 8; a suspicious P was seen on the ground, in an alkit post- we, then it went into a tuill given the tail up and walked forward. The tuill, low of pitch and volume continued; the P went into a groy area and went into a nest up posture, the tail up, wings closed and heart to its ground, but no turning, then rose and continued the tuill. After a short time it stopped, then after an interval and hovered 8-12 feet up giving the "moto- boat" song for about 30 seconds, landed and went into the tail up and worked to Nest 8, trilling occa- sionally (once ½ ft from the nest) and sat. The whole procedure was done about 20 feet from the nest & the P was 10 feet away on the other side of the nest, 30 ft. from the P, and gave the short wildious tuill anxious birds after give. The nest contained 4 eggs when found June 27, and I am at a loss to explain all this, other than it must be worked by by the other birds in the area. July 8 A flock of at least 8 birds still in the area around 07/1-8 and a little display noted although I suspect the heavy wind depressed it quite a bit. Nest 20 still has 3 eggs but nest 19 has 3 too well, much