Black Inca forages by traplining, that is, it visits scattered sources of nectar which it does not defend. In the Reserva Biológica Cahalú, this species visits scattered flowers and so covers large distances when foraging (Daza and Villamarín 2006). This hummingbird visits flowers at the intermediate levels within the forest or low levels of forest edges (Snow and Snow 1980).
Social and interspecific behavior
Despite being primarily a trapliner, Black Inca occasionally demonstrates territorial behavior at concentrated nectar sources, and pursues species such as Sparkling Violetear (Colibri coruscans), Green-fronted Lancebill (Doryfera ludoviciae), Collared Inca (Coeligena torquata), and White-sided Flowerpiercer (Diglossa albilatera) (Snow and Snow 1980, Daza and Villamarín 2006, Suárez-Pinzón and Torres-Pineda 2009).