Abstract
This paper reports previously unrecorded populations of thirty-two species of hill forest and montane birds from the Adelbert Range, Papua New Guinea. Three new subspecies are described: Rallicula forbesi parva, Sericornis nouhuysi adelberti, and Amblyornis macgregoriae amati. The avifauna of this range is impoverished, as are avifaunas of other isolated ranges in New Guinea. Adelbert species show subspecific affinities to populations from the ranges of the Huon Peninsula, or from the Central Ranges, or from both. Montane species may be restricted to only a very small part of the Adelbert Range.