Gr. Graves, DIAGNOSES OF HYBRID HUMMINGBIRDS (AVES, TROCHILIDAE). 2. HYBRID ORIGIN OF ERIOCNEMIS-SODERSTROMI BUTLER, Proceedings of the Biological Society of Washington, 109(4), 1996, pp. 764-769
Eriocnemis soderstromi (Butler 1926) is shown to be a hybrid between E
. nigrivestis, an endemic of the Volcan Pichincha region in Ecuador, a
nd E. luciani, an inhabitant of timberline Andean forest from southern
Colombia to Bolivia. This is the first report of intrageneric hybridi
zation among the nine species of Eriocnemis. Plumage characters of the
hybrid appear to be a blended intermediate of those of the parental s
pecies. External measurements of the hybrid are intermediate of those
of parental species.