The fore wings are black. At the wing tip there is a green stripe. In the middle of the wing there is a broad, green band.
The underside of Ornithoptera rothschildi is black. There ar many green marks on the wing.
The hind wings of Ornithoptera rothschildi are golden. The edge is black. In the middle of the wing there is a green area. This area contains black spots.
The underside is a copy from upside, but the golden area is surrounded by a green line.
The body (abdomen) is yellow. Head and thorax are black. The underside of thorax has a red hair-coat.