DuVal, E.H. 2003 Journal Isla Boca Brava, Chiriqui Prov., Panama 10 May 2005 p.3 female for solo display. But once at the beginning of this field season I observed WAY displaying solo (SF-1) for a female who was on dance perch FBE1 while RIV sat just a few feet from the dance perch, watching. This is unusual because way had previously (and did again later) play the beta role for RIV at FBE2; Beta's do not sit so close and observe solo dance displays - they usually move some distance away There was no two-? dance for this particular female. So what's going on here? Is this a type of concession by RIV? Are the paired displays a sort of rent-paying by WAY? Does RIV never dance with way on FBE1 dp as a beta (ie RIV leaves x way stays)? Is this a form of reciprocity? Certainly this was RIV's territory long before WAY joined him. Is this the only pair of males that splits dance perches up between them within one territory, yet maintains a partnership? There's potential for this situation at WELY, SBE1, & ADS-NEC. This arrangement would make sense if cooperative display evolved from ancestors who only displayed cooperatively at teritory