58 July Journal Duval, E.H. 1999 Richard Williams Isla Boca Brava, Chiriqui Prov., Panama July lance - seem to flock, perhaps more social, mixed sex flocks, ? vocal as well as males Perhaps a perch approach is limiting calls are very different Pip Que rico, broken Tia Warble Nrows Dance sound different Colors (?) R cap brighter possibly bigger blue back sl. darker bird bulkier-looking? Centr. w/ Monteverde Diff habitats, density diff huge in Monteverde ~ 80 males, 80 hectares Nesting habits - no suggestion of communal nesting Reasons to be together - not a great abundance of fruiting trees; ? pop in disturbed area; tree height Wah vs. Wa - assech in long-tailed Variation betw. calls in longtails. Perhaps the same in lance-tailed?