A M Verbeek. 1966 Calidris alba (5) bird, which I judged to be a female because of the small amount of brown around the head. After observing it for some 20 minutes, while it fed along the polygon ridges, the bird flew up and went for some 500 m in the direction of MicroMet where I lost it out of sight behind the buildings. 2 July The female was not on the nest at 14:15 - eggs (4) were in the nest. I found the female feeding S. of trapline IX a X roughly 350 m to the S. of the nest. At + 15:15 she was on the nest, sitting very tightly as I walked by. I have not seen the male since the day we found the nest, 8 days ago. 4 July The 4 eggs were present, no bird on the nest at 11:15 5 July Four eggs present, q not on the nest at 21:15. This is the second day now that she has not been on the nest, when I came by. 6 July There was one bird around a small pond in the Britton Area. I watched the bird feed for some 20 minutes along the pond edge and the meadow behind it. During half this time it fed in company of two Semipals. After the feeding it preened itself and then flew over Honey Bucket in the direction of the Drum Area. It looked like this bird was a male judging by the amount of brown around the head and neck. The male of the nesting cpair also showed more brown than the female. Could it be that this male I saw today is in effect the male of the nest? If he indeed goes this far away from the nest, it could explain why I have not seen him around for so long. 7 July When I arrived at the nest, 13:50 the q was not on, but the eggs were warm, so I stepped back prepared for a long wait. Fortunately at 13:55 she returned and walked to the nest.