JP Nugus 1975 Calidris pusilla Grid 2 8 July revising grid 2. found pusilla guarding chicks (although did not find chicks) their behaviour is noticeably different from that when they are merely trying to keep you away from nest. Much more active, frantic. Notably constant alarm calls. but the most striking thing other when one pair is calling in this fashion others will join - no sign of supplanting or pair of previously territorial birds. This can be immediately beside old nest site. By squeaking I was able to induce rapid run display in 3 adults at once all within 6 m of one another (see alpine sparrow). Votta Creek dug mouth 10 July Walking from parking area to Gasline ridge (1325) found 6 adults in close proximity to one another. They were already there when I walked up - when I came they began giving intense distraction display of the sort I began seeing once chicks began to hatch. Could this be some sort of creche of chicks then. Deadhorse Airport, near Prudhoe, Alaska 2 August 1330 - a flock of 20-30 pusilla spread over a pond at the airport, behaving as in non-breeding families! all juveniles w/ excessively buffy chests, hints of rufus to scapulars, and pronouncedly scaly backs. Watched one individual (w P.O.Connors) for 15 min as it foraged and fought along the shore nearest to us (bird #1 below). shared a border w/ #2 as indicated. we witnessed one [sketch of two birds near shore, labeled 1 and 2, with approximate distance ~7m] border fight - a classic calidridin tail down, erection of back feathers, crouch + squeak. Both individuals doing so within 30cm of one another. #1 consistently chased off intruders from all areas of the tent top, flying from one end to the other if need be. Middle Salt Lagoon, Pt. Barrow 3 August we have been invaded by pusilla juveniles - there are at least 200 between the Bithan Creek and Votta Creek along the shore of Middle Salt Lagoon. foraging at water's edge, particularly in small isolated pools near the main water body. Many fly out on the tundra - see