Devel of coord. Singig - Julias talk Passerines = song birds or oscines? RC = SY CB = TY DM = FY eek Hy: Partners become matched over time Trainer & McD didn't have multiple yrs. Short-term accomodation - consider post-DM age classes Generalized variance Which traits of song A w/ age - Review results slide 1 Same as what McD found for Long-tailed Good randomization test - partners more matched than random partners. Active partner choice AI != frequency matching - Review long-term devel part Long term predictors explicitly. Walus coordinate [illegible] Canopy vs. understory diff. % of time singing Matching during aggressive interactions