Specimens of Bushman Folklore, by W.H.I. Bleek and L.C. Lloyd, [1911], at sacred-texts.com
THE #NERRU, AS A BIRD
The #nerru's bill is very short. The male #nerru is the one whose plumage resembles (that of) the ostrich; it is black like the male ostrich. The female #nerru is the one whose plumage is white like (that of) the female ostrich. Thus, they resemble the ostriches; because the male #nerru are black, the female #nerru white.
They eat the things which little birds usually eat, which they pick up on the ground.
They make grass nests on the ground, by the root of a bush.
When not breeding, they are found in large numbers.