Journal Isla Boca Brava, Chiriqui Prov., Panama 10 May 2003 p.4 boundaries, like some Pipra. Hypothesis: Alpha-beta pair GR together to advertize the area, defend it, & attract Ff. Display together as necessary at the main dance perch, and the ? only has access to females. ? may or may not be allowed to do solo displays for ff elsewhere in the territory. Skew theory would predict that not all pairs of males would share mating opportunities equally. What is different about pairs that share vs. those that don't? Would expect sharing pairs to be less related than non- sharing pairs. "Pair type" isn't a predictor of sharing (is it?) - RYV and WAY ~~are~~ would be considered closely-bonded and are always seen singing together, and regularly dance for females. How can I get more data on this? I need an army of people or video cameras watching multiple perches in a given display area simultaneously. Not all display areas seem to have multiple perches. What makes the difference?