However, Serle (1952) had pointed out a number of similarities between this species and the two species of rockfowl (Picathartes): similar proportions, the position of the nostrils, the shape of the forehead, and that of the tail.
Serle (1952) identified similarities between this species and two rockfowl species (Picathartes): comparable proportions, placement of nostrils, forehead shape, and tail form.