The fore wings are black. At the wing tip there is a green stripe and one golden spot. In the middle of the wing there is a large, green band. The rear edge is green.
The underside of Ornithoptera tithonus is black. At the outer edge and in the middle of the wing there is green area. The veins are black and they cleave the green areas. The golden spot at the wing tip is tansparent like a window.
The hind wings of Ornithoptera tithonus are multicoloured. The inner part of the wing and the edge are black. The other part of the wing is green. The green area contains some golden spots and three black spots.
The underside is green. Some golden spots and some black spots are on the wing. The inner edge is very hairy.
The body (abdomen) is yellow. Head and thorax are black. The underside of thorax has a red hair-coat.