Which scientific name has been historically used to group the Vermilion Flycatcher populations of North and South America?

Answer

Pyrocephalus rubinus.

For many years, the various populations across the Americas were commonly grouped under the single species name Pyrocephalus rubinus. While contemporary systematic studies and various ornithological authorities have begun to re-evaluate and split these groups into distinct species within the genus, this name served as the primary, widely accepted classification for the entire complex for a long period of time.

Which scientific name has been historically used to group the Vermilion Flycatcher populations of North and South America?
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