Fairly small hummingbird with a limited range in the foothills on the east slope of the Andes from southern Colombia to northern Peru. The broad white collar and extensive white in the tail are the most obvious field marks, otherwise it is green above and white below with a straight bill. Occasionally visits feeders, but is more likely to be found in the understory of forests in the foothills from around 900 to 1,300 m. Compare with female Booted Racket-tail and Rufous-vented Whitetip.