The genus Rhyacornis contains one species, which is closely allied to both Chimarrhornis and Ruticilla. It differs from both these, however, in the shortness of its tail, which is about twice the length of the tarsus, and in its strong rictal bristles. The female, moreover, has no chestnut on the tail.
The only member of this genus inhabits mountain-streams, and is always found near water, especially where this forms a rapid or a cascade. It has the habit of expanding its tail frequently.