Black-throated Brilliants are large, dark hummingbirds. Males are black below while females are grayish underneath. Both males and females have a small purple throat patch, but it’s often difficult to see. Females do have a visible white or rufous malar stripe below the eye, which is helpful in their identification. These hummingbirds inhabit tall humid forests and scrub where they primarily forage in the shaded understory, searching for nectar or hawking for insects.