This hermit hummingbird occurs in Argentina, Bolivia, Brazil, and Paraguay. Its long, slightly curved bill and long tail feathers are distinctive.
Its central tail feathers are very long, and the long bill curves slightly downward. The upper tail coverts are reddish, and the underparts are cinnamon-colored.
It uses forests, scrub, and dry woodland, feeding on nectar and small insects. The account also records it in gardens and parks.
An extinction-risk assessment has not been added yet.