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.

The underside of wings is brown with markings similar to upperside but whitish in colour.

[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.

The common jay is active throughout the day and constantly on the move; it rarely settles down.

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