Diagnoses of hybrid hummingbirds (Aves: Trochilidae). 2. Hybrid origin of Eriocnemis soderstromi Butler

Abstract

Eriocnemis soderstromi (Butler 1926) is shown to be a hybrid between E. nigrivestis, an endemic of the Volcan Pichincha region in Ecuador, and E. luciani, an inhabitant of timberline Andean forest from southern Colombia to Bolivia. This is the first report of intrageneric hybridization among the nine species of Eriocnemis. Plumage characters of the hybrid appear to be a blended intermediate of those of the parental species. External measurements of the hybrid are intermediate of those of parental species.