What insect group makes up nearly one-third of the White-Eyed Vireo's summer diet while nesting in the eastern United States?

Answer

Caterpillars, moths, and butterflies combined.

The core sustenance for the White-Eyed Vireo during the warmer months, especially when actively nesting and raising young throughout the eastern United States, centers on small invertebrates. Among these arthropods, soft-bodied larvae are paramount. Specifically, caterpillars represent a highly important food source. When considering the larger order of Lepidoptera, caterpillars, moths, and butterflies, when taken together, constitute nearly one-third of the vireo's total dietary intake during the peak breeding season. This heavy reliance on these specific larval forms highlights the intense nutritional demands associated with producing energy for reproduction and feeding offspring.

What insect group makes up nearly one-third of the White-Eyed Vireo's summer diet while nesting in the eastern United States?
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