Chunky, stout-billed hummingbird of mid-elevation cloud forest. Plumage is mostly glittering emerald-green. Male has blue or violet forehead and iridescent green throat that appears dark from most angles. Female has white scaling on underparts and white mustache stripe. Young birds may have a coppery tinge on face and throat. Usually found alone inside forest or at forest edge; visits feeders in some areas.