Figure 2. Photographs of nests illustrating visible differences in nest morphology and composition.

Representative nests from northern Manitoba (left) and southeastern Ontario (right) for American Robin, Yellow Warbler, Savannah Sparrow, and Carduelis finches (Common Redpoll on left and American Goldfinch on right). Note that the shape and morphology of the Savannah Sparrow nests are distorted because they are ground nests that lose their structure when removed from the nest site.