I AM Verbeek 1966 Arenaria interpres (1) June 3 Among a flock of Glanis gulls there were some 12 Ruddy turnstones. There is as yet not much indication of pair formation, although you do not see birds together as the Sanderling at present. They are a moity bird at present. There are two west of our camp; maybe they will meet there. June 4 Three birds on the sandy disturbed shore West of camp. June 5 Ruddy turnstones are still present = small group (± 1) west of our camp. 6 June There were 3 pairs of Ruddy Turnstones and one single Male on the beach west of our camp. They were very much engaged in territorial display with one bird approaching the other with a hunched back, which is probably brought about by his raising the feathers of the lower neck and upper back. After such an approach the bird which is being approached usually flies off or is then pursued by the attacker or defender. 8 June Widely spaced I saw several Ruddy Turnstones on the tundra today. Around Hooney Bucket wagon I saw two single birds. North of Wohlschlag slough there were two pairs. This species feeds on the tundra by sticking the bill to the ground and the flicking pieces of mud etc. sideways. 10 June Found the first nest of the season, with two green eggs in it. The nest was not more than a scrape with some bits of grass in it. The whole was placed on a large frost boil, so that, there was rather little vegetation around. The adults were not around.