Berylline Hummingbird (Saucerottia beryllina) [XC611100]
by Manuel Grosselet from MEX, Oax, oaxaca Jardin Botanico, Mexico (alarm call)
Berylline Hummingbird (Saucerottia beryllina) [XC333647]
by Richard E. Webster from Tlalpan (near Ciudad de M\u00e9xico), Ciudad de M\u00e9xico, Mexico (alarm call, cars, city, people)
Subspecies
Forms a superspecies with Blue-tailed Hummingbird (Amazilia cyanura). Reports of hybridization in a small zone of sympatry in Guatemala and El Salvador seem to be unproven, and may be erroneously based on variable tail coloration of present species. Subspecies sumichrasti, long ignored, has proved to represent a well-marked subspecies. Individuals of westernmost subpopulation of nominate subspecies show intergradation towards viola in belly coloration.
Proposed subspecies motaguae from eastern Guatemala is invalid, as main distinguishing characters can be ascribed to juvenile or female plumage.
The following 5 subspecies are recognised:
viola (Miller, W, 1905) - North-western and western Mexico, rarely south-western USA.