It is found in Ethiopia, Kenya, Rwanda, Somalia, South Sudan, Tanzania, and Uganda.

[2] The adult slate-colored boubou is 20 cm (8 in) long and wholly dark slate grey.

[3] The male's call repertoire includes a noisy shhhhh, or strong clicking and coco-weet, with a rising inflexion on the last syllable.

[5] The frequencies with which the male boubou sang the territorial songs vary with the extent of threats from other boubous and with the level of cooperation between mates.

[6] The slate-colored boubou lays a clutch of 2-3 eggs in a nest in a shrub or tree around 1.5 m (5 ft) above the ground.