This hummingbird is endemic to Robinson Crusoe Island in the Juan Fernández Islands. Males and females have very different plumage.
Males are dark brick red with golden feathers on the head. Females have a dark green back, a bluish crown, a white underside, and green spots on the throat and sides.
It often hangs from flowers while feeding on nectar. It uses flowering shrubs and trees, including in gardens in the island settlement.
It also eats insects, as well as nectar.
An extinction-risk assessment has not been added yet.