The Black Nunbird is about 25–29 cm long. It is diurnal in northern South American humid forest and scrub, where it sallies to take small invertebrates from nearby surfaces.
It is about 25–29 cm long and weighs about 74–104 g.
It is diurnal in humid forest and scrub. From a perch it makes short sallies to take invertebrates from surfaces such as foliage or the ground.
It eats spiders, caterpillars and flies, and also takes lizards. It nests in a hole in the ground.
It calls very loudly, often duetting or singing together in a small group.
Its plumage is dull black, with greyish-white edges to the wing coverts. The slender coral-red bill curves slightly downward; the legs are black and the sexes look similar.
An extinction-risk assessment has not been added yet.