Aphriza virgata (15) Athear 1968 25 May) other bird. 26 May Started from camp at 6:45 and didn't see a surfbird until 9:15, when I was on a ridge at the S. edge of Weezer's Mastodon study area. This sighttip was a pair on a tributary ridge I main ridge. I came over a bump and found them quite close together. They flew. Where they had been I found what looked like a fresh nest scrape as used in Caliprine nest-cup display - i.e.- slightly smaller and deeper than an actual nest, and obviously freshly excavated. Since there were also bairdii in the area I can't be sure that surfbirds were responsible but they may have the nest cup display. This pair flew and I was unable to follow. On the next tributary ridge saw 3 birds and several golden plovers. As soon as I came into sight these separated into a closely associated pair moving with 1 golden plover and a lone surfbird. The pair flew away with the plover, but the single bird seemed attached to the area - it flew small distances, but would not leave the terrace on which I found it - ca. 200 m across. Wisher I had