page 13 18. The table shows information concerning some characteristics of three species of MacArthur’s warblers, which are closely related species of insectivorous songbirds living in spruce forests in north‑eastern USA. Species of MacArthur’s warblers Setophaga fusca Setophaga coronata Setophaga castanea Foraging zone treetops trunk area of trees middle interior portions of trees Nesting sites high in trees near tips of branches horizontal branches in trees up to 15 m lower portions of spruce and fir trees Food sources insect larvae, spiders and spruce budworm insects, insect larvae and spruce budworm insects, spiders and spruce budworm Nesting period May–July May–July May–July The strongest evidence of resource partitioning between these three species comes from the analysis of their: A foraging zone and nesting period B nesting sites and food sources C nesting period and food sources D foraging zone and nesting sites. [Turn over