| variation in the structure of bird nests between northern manitoba and southeastern ontario. | traits that converge in appearance under similar environmental conditions among phylogenetically independent lineages are thought to represent adaptations to local environments. we tested for convergence in nest morphology and composition of birds breeding in two ecologically different locations in canada: churchill in northern manitoba and elgin in southeastern ontario. we examined nests from four families of passerine birds (turdidae: turdus, parulidae: dendroica, emberizidae: passerculus and ... | 2011 | 21552515 |