This hummingbird is recorded in Argentina's humid scrub and forests. The local account describes a fork-tailed, vivid male and a greener-backed, gray-bellied female.
Males are green with violet shoulders, lower breast, and belly; the throat and upper chest are bright emerald. They have white undertail coverts and a blue-black forked tail. Females are green above, bluish on the rump, and gray below.
The Argentine account places it in humid scrub and forest. It reports two white eggs, about 11–13 by 6–8.5 mm, but does not describe nest placement or incubation.
An extinction-risk assessment has not been added yet.