Characterization: Small species measuring about 12.6cm in length. It has a showy color contrasting with its tail feathers, which are displayed when the bird opens it up in a white fan cut into two halves by the central black feathers or when it opens and closes them quickly. The white of the tail continues up to the bird's sides, forming a single stripe. Younger individuals are almost completely spotted, with cinnamon- or black-colored tail feathers with white sides.

Distribution: From Paraíba to Rio Grande do Sul.

Habitat: Edge of the woods, secondary forests, gardens, banana crops, and often in high tree canopies.

Habits: A diurnal and solitary species which seems to remain more stationary in the air than other hummingbirds, always showing off its contrasting colors. It is among the very few birds that have the ability to hibernate, as do all other species of hummingbirds.

Diet: This bird feeds mainly on nectar and eats insects and spiders almost exclusively in flight as a source of protein and fat.

Breeding: It lays 2 eggs using cobwebs and seeds with kapok to weave its nests in the shape of a small bowl, which is anchored in its place using threads of vegetation.

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