Cuckoos are abundant, some of them of lovely plumage, also rollers, kingfishers and hornbills.
Its striated plumage also favours this view, as an evidence of permanent immaturity or generalization of form, since striped feathers are so often the earliest clothing of many of these birds, which only get rid of them at their first moult.
Still it is brisk in its movements, and its variegated plumage makes it a pleasing bird.
As a whole, the birds of Papua are remarkable for their brilliance of plumage, or their metallic colouring.
This splendid plumage, however, belongs only to the adult males, the females being exceedingly plain birds of a nearly uniform dusky brown colour, and possessing neither plumes nor lengthened tail feathers.