Characterization: Small species measuring about 12.6cm in length. It has showy, contrasting tail feather colors, which are displayed when the bird opens its tail, which looks like a white fan cut into two halves by the central black feathers or when it opens and closes it quickly. The white area of the tail continues up to the bird's flanks, forming a stripe. Younger individuals are nearly entirely stained; their tails are cinnamon-colored or black with white side feathers.

Distribution: From Paraíba to Rio Grande do Sul.

Habitat: Edge of the woods, secondary forests, gardens, banana fields, often at high tree canopies.

Habits: A diurnal and solitary species, this bird seems to stay stationary in the air longer than other hummingbirds, always displaying its contrasting colors. It is among the very few birds that have the ability to hibernate, as well as the other species of hummingbirds.

Diet: Mainly nectar, feeding almost exclusively in flight. They also feed on insects and spiders.

Breeding: It lays 2 eggs, using spider webs and seeds with kapok to weave its nests in the shape of a small bowl and attached to the vegetation with threads.

In the UFRA area: In the studies carried out at UFRA areas, this species of bird had a restricted spatial distribution. It was found only in the organic sugarcane fields. The strong presence of spider webs (feeding and reproduction) has represented a double source of resources for this species. It is considered rare because it was only spotted once.