This hummingbird is recorded only in Colombia's Sierra Nevada de Santa Marta. It uses high mountain forest and páramo, feeding on nectar.
Males have a black back, iridescent green crown and throat, and white belly. Females have muted green upperparts and a pale grey underside.
At 2,400–3,800 m in high mountain forest and páramo, it feeds on nectar and may also take small insects and spiders.
An extinction-risk assessment has not been added yet.