 One unusual feature of rainbow pitta nests, shared only with the noisy pitta in this family, is the addition of wallaby dung pellets to the entrance of the nest.In a study of 64 nests in the Northern Territory, 34% were decorated in this way.The function of the dung is uncertain; it has been suggested that the scent disguises the smell of eggs, nestlings or incubating adults from nest predators, but researchers found that decorated nests were preyed upon as frequently as clean nests.