Classified as vulnerable, these iridescent hummingbirds have a small range in Venezuela and Tobago. Deforestation, especially slash and burn agriculture, continues to be a significant threat to the population. In 1963, the Tobago population fell dramatically following the destruction of hurricane Flora, but it appears to be recovering. White-tailed Sabrewings inhabit montane forests, light woodlands, and coffee plantations; in Venezuela, they have historically been common in Paria Peninsula and Cuevo del Guáchero National Park, Caripe, and Cerro Negro. While they typically forage in the low and mid-levels of the forest, they also feed in Venezuelan woodland canopies, sometimes feeding around aggressive hummingbirds. Males frequently sing from a perch when they aren’t visiting bromeliads and banana trees. Males appear to glitter all over and exhibit a violet-blue throat and predominantly green upperparts. Females are duller with less blue, and gray mixed with green below. Both sexes have a white spot behind the eye and white outer tail feathers.