Among American warblers, several different species often live in the same spruce trees and eat caterpillars. However, each species reproduces at a slightly different time of year and each species also forage at different areas within the tree canopy. These differences in foraging behaviors and reproduction is an example of .

Resource partitioning

Explanation:

When two or more species have a requirement for the same limiting resources, competition exists between them. To reduce competition, members of these species develop certain strategies that allow them to coexist in the same habitat. It is called resource partitioning. It includes different timing and locations of feeding, different nesting sites, etc.

In the given example, different species of American warblers live on the same spruce trees but use the different areas of the tree canopy as nesting sites. These species also reproduce at different times to avoid competition. Therefore, it represents resource partitioning.

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