MacArthur demonstrated the coexistence of warblers with different foraging patterns on the same tree. This is an example of

Resource partitioning, as explained by ecologist Robert MacArthur, refers to the division of resources among different species in a community to minimise competition and allow coexistence. In the case of warbler birds foraging on a tree, different species may have evolved distinct foraging patterns or preferences for specific types of food within the tree. This allows them to exploit different resources and reduce direct competition for food, thereby enabling their coexistence on the same tree.