PDB Catalogue -12 Mack River Cold Mine, (157°25'W), 70°37'N, Alaska 14 July 1966 stomach only 510 8in. shell Calidus pusillus 23.0 gm. light fat. testes L 3x1 mm. brood patch refeathering, moderate molt head, ventral tracts, light molt dorsal tracts no wing molt. feeding data 3 P.M. fledgling 4/3 cupinus ml 1/6"salts ple stomach only 511 8in. shell Calidus pusillus 24.9 gm. light feet testes L 3x1 mm brood patch refeathering, moderate molt head, neck; light body molt. shot on Conicularia-Cetania flat, not feeding. stomach only 512 9in. shell Calidus melanotos 51.6 gm. light fat largest egg 2mm, several well regressed follicles. brood patch, light molt ventral bevoiced tract. mother of 507-508 PDBs. not feeding when collected: flew in from Camp pool. stomach only 513 9in. shell Phalacropus fulcarius 43.6 gm. very light fat. testes L 3x2 mm. brood patch no molt. not feeding, shot from pond 6" water 1/0 10/8 3 P.M. stomach only 514 8in. shell Phalacropus fulcarius 50.2 gm. light fat. testes L 3x1 mm brood patch, light molt crown. shot from same spot as above, not feeding. 15 July 1966 > N UMMZ large 515 8 chick Phalacropus fulcarius 20.7 gm. light fat every 0 caught at edge of River bluff by camp ca. 2 P.M. with 516 > N UMMZ large 516 8 chick Phalacropus fulcarius 21.9 gm. light fat testes L 2.0 mm stomach only 517 8in. shell Phalacropus fulcarius 43.1 gm. moderate fat. testes 3mm. brood patch beginning to refeather, light molt head & neck, shot in pond 10" pw 1/0 m 12/14 not feeding 11 A.M.