The Black Jacobin is a hummingbird with mostly black plumage, bronzy-green back and wing coverts, and a white tail. It feeds mainly on nectar but also takes insects, living in woodland and gardens from eastern and southeastern Brazil into neighboring countries.
It is mostly black, with bronzy-green lower back and wing and tail coverts. The underside of the tail is white; young birds have less white in the tail.
It feeds mainly on nectar and also takes insects. The female builds a cup-shaped nest from plant fibres and spider webs and feeds the chicks.
An extinction-risk assessment has not been added yet.