Aves 4 Brood parasitism 4 Host specificity 4 Mimus saturninus 4 Molothrus bonariensis 4 Pseudoleistes virescens 4 Shiny cowbird Troglodytes 4 Troglodytes aedon 4 Zonotrichia capensis 4 brood parasitism 4 habitat selection 4 host specificity 4 mate fidelity 4 mitochondrial DNA 4 mtDNA 4 nesting 4 passerine 4