The Papuan Grassbird is a species of typical grassbird

Megalurus

Megalurus is a genus of passerine bird in the family Locustellidae. The genus was once placed in the Old World warbler "wastebin" family Sylviidae. The genus contains six species also known as the typical grassbirds...

 in the family Locustellidae. The species was once treated as a several subspecies of the Tawny Grassbird

Tawny Grassbird

The Tawny Grassbird is a songbird species of the grass- and bush-warbler family . It was formerly placed in the "Old World warbler" assemblage....

, but the two do not interbreed where their ranges are sympatric. The species is endemic to New Guinea

New Guinea

New Guinea is the world's second largest island, after Greenland, covering a land area of 786,000 km2. Located in the southwest Pacific Ocean, it lies geographically to the east of the Malay Archipelago, with which it is sometimes included as part of a greater Indo-Australian Archipelago...

 and its satellite islands. There are seven subspecies ranging across montane areas of New Guinea, New Britain

New Britain

New Britain, or Niu Briten, is the largest island in the Bismarck Archipelago of Papua New Guinea. It is separated from the island of New Guinea by the Dampier and Vitiaz Straits and from New Ireland by St. George's Channel...

 and New Ireland

New Ireland (island)

New Ireland is a large island in Papua New Guinea, approximately 7,404 km² in area. It is the largest island of the New Ireland Province, lying northeast of the island of New Britain. Both islands are part of the Bismarck Archipelago, named after Otto von Bismarck, and they are separated by...

. It is a fairly large typical grassbird, 20–23 cm (7.9–9.1 in) long and weighing 40 grams (1.4 oz).