LLWS/15 1963 Amphila humeralis August 8 7 mi. S. Piaxtla, Puebla in pairs, altho we have no evidence to date that they occur in groups during the breeding season. August 22 E Pni. E. Cuernavaca, Morelos, Mexico postnupt. 2392 - some 21 molting. scattered body molt. refecthering brood patch. 2393 - worn, brood patch. 2394 - no molt. 2395- cl. just end. no molt 2396 no molt 2387 - scattered body molt. 4-6 feathers look new, postnupt. 2398 - brood patch, scattered body molt. white shelled egg in shell case 2399 - refecthering brood patch, scattered body molt. po 2400 - cl. prot. end. scattered body molt. 2401 - brood patch, scattered body molt. found birds in pairs or if in groups of 3 I think one of birds was a young. Saw one young not quite three postnups. molts John collected a juvenile. Birds were still singing at 0830 + heard clut chattering from almost every pair. Heard spluttering call of humeralis from several birds as I approached to collect. It is a series of rapidly repeated clipping-type notes which may be 2-part to give sputtering effect.