Graphium doson, the common jay,[1][2] is a black, tropical papilionid (swallowtail) butterfly with pale blue semi-transparent central wing bands that are formed by large spots.

[3][4] It is widespread and common throughout Southeast Asia, including lower elevations in Sri Lanka and southern India, Eastern Ghats, Satpuras, Bengal, Assam and Bangladesh, and the Himalayan foothills.

[1][2] It is common in thick, riparian, moist, deciduous, semi-evergreen and evergreen forests.

The spherical and pale yellow eggs are laid singly on the underside of leaves.

There are spines on the fourth segment which are short, conical and blue centred surrounded by lemon yellow and then black rings.