Journal Prudhoe Bay, N Slope, Alaska 31 July (cont'd) Pluvialis dominica (cont'd) hour on tundra. very few broody adults left. none seen in full misted plunge. Pluvialis squatarola & flock seen regularly. this is exclusively a lowland bird at Prudhoe now, at least for individuals in migration. Flocks up to 15, often w/ one or two in nearby full fleeding plunge. uses vegetated flooded lake basin or bare mud, both in littoral zone and in tundra away from coastal region. Arenaria interpres - none seen since 22 July Calidris melanotos - a few broody eggs still around. one found w/3 chicks ~1 week old on 29 July, suggesting a clutch completion date as late as 5 July. Most calidris marshes have a broody & or 2 or up to 4 at once have incubated us within last 4 days. no brood buildup of migrating &. juveniles becoming a regular but very scarce commodity. Calidris - fledged juveniles seen in a number of places, usually along littoral. Broody adults also encountered. My strong feeling is that they are largely a coastal breeders, using the "bluffs" along sloughs and rivers by the littoral. But they also breed on higher snowy sites as far as 10 miles inland (who knows about further) e.g. on pingos or crevices. If any calidris breed in the Sag River consolidated dunes (P-19) it will be calidris. 5 juveniles seen on Sag River gravel bar 31 July C. alpina - juveniles fledging. adults flocking. not a bird to expect regularly in count or in any given place but found regularly + quite patchily, such as on occasion we happen across flocks of 10-15. also lowland and somewhat into uplands + mesic polygonized tundra. adults molting, but black patch not yet conspicuously blotchy. C. pusilla - adults have disappeared abruptly, juveniles invaded (see sp aceat), counting 28 July w/1000's along littoral. Differ from Barrow in that here they are also conspicuous on some tundra locations. Flocks seen regularly moving hardscrabble. Littoral habitat: largely Ruddy Plover, Phalaropus fulicarius, foraging along receding water line in very yucky mud. Their scutellation probably saves them from a La Brea's fate, sucked into red muck. See sp. account re appearance