These fast-flying , territorial hummingbirds are found only in the Santa Marta mountains of Colombia. White-tailed Starfrontlets are most often seen visiting low shrubs in humid and wet montane forests. Males prefer small openings inside the forest, while females favor forest edges. Males sparkle with green above and below and possess a glittering violet-blue throat patch. Most notable, however, are their immaculate white tails. Females look fairly different and are green above with rufous underparts and bronzy tails.