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Which finding from Medina and her colleagues' study, if true, would most directly challenge the assumption that domed nests allow species that build them to have larger geographic ranges than species that build open nests do? Although most songbirds build open, cupped nests, some species build domed nests with roofs that provide much more protection. Many ecologists have assumed that domed nests would provide protection from weather conditions and thus would allow species that build t hem to have larger geographic ranges than species that build open nests do. To evaluate this assumption, a research team led by evolut ionary biologist Iliana Medina analyzed data for over 3,000 species of songbirds.