Melanotrochilus fuscus (Vieillot, 1817) The black jacobin (Florisuga fusca) is a species of hummingbird in the family Trochilidae.

Juveniles are dark except for a wide cinnamon band on the center and sides of the throat and a white belly and outer rectrices.

[5] The black jacobin is found in southeastern Brazil, approximately from Bahia south through Rio Grande do Sul and into eastern Uruguay, and separately in southeastern Paraguay, northeastern Argentina, and adjoining Brazil.

However, "congregations" of 50 or more have been documented in July feeding on patches of Dombeya wallichii, an introduced shrub.

In addition to nectar, the black jacobin takes small insects on the wing and from leaves and spider webs.

Its nest is a cup made of fine plant fibers and cobweb, placed on the mid-rib of a large horizontal leaf, typically between 1 and 4 m (3.3 and 13 ft) up in a tree or shrub.