NAM Verbeek 1966 Calidris alba (2) the male went thru the following bit of behavior. He would conch down in the grass and lower his body flat on the ground and stick his head forward horizontal with the ground. The body feathers were smooth (not ruffled). The tail was slightly raised exposing the white underside. The incline of the tail, taking the leading edge of the wing as the horizontal was about 15-20°. During this conch the bird remained silent, and absolute motionless for about 30 seconds. Prior to going to the crowd, the bird walked around as if compressed fronto-posteriorly, slightly arched back. In this posture the bird appeared very tense. During this behavior the female kept on feeding. 19 June. At about 15:15 I was out S of Honey Bucket again, at the same spot were Pitella and I saw the Sanderling in the evening of June 17. This time I noticed the male notating in a nest bowl, like I saw the Baird's Sandpiper do. The tail was up and he was shaping the nest bowl with his breast. After rotating once he stepped out and began to throw pieces of grass behind him. In the Baird this grass shaking seems over the shoulder. In the Sanderling it looked like it was done more side ways along the body, not over the shoulders. After he had done this for some 20-30 seconds he went back to the bowl and repeated the rotating after which he put in some more grasses. At first while remaining at the bowl and then by going out of it. The returned for a third time to the bowl, after he had walked away from it for a meter or more. When he finally left it for good he walked around in a worried manner, around