Males and females the same size, they have identical plumage too . This species is heard more often than seen, but its calls often help to locate it visually. To vocalize they move higher off the ground than during their usual activities, and may perch on an exposed site. They also nod their head and bow their body when calling, making them even conspicuous sometimes. Calls like bou, hou or boubou give the bird its name.It usually forages on or near the ground, and does not ascend to the tree canopy often. It holds large prey down with its foot while eating.The food includes many kinds of large terrestrial invertebrates and their larvae as well as small terrestrial vertebrates,