It is basically black and white in colour scheme, it has a very large white-tipped tail, 25 to 40 millimetres (0.98 to 1.57 in) long.

This band is continued onto the black hindwing which bears the long tail and prominent abdominal wing fold.

[2][3] The butterfly is found in northeastern India, in the states of Assam, Arunachal Pradesh, Manipur and Nagaland.

[3] It is also found in Myanmar, Thailand, Laos, Vietnam, southern China (including Hainan), Cambodia, peninsular and eastern Malaysia, the Indonesian archipelago, Brunei, and the Philippines.

[5] A 2004 report had earlier suggested that the status of the green dragontail in Garbhanga Reserve Forest was "very rare"; later a total of 108 butterflies of genus Lamproptera were seen during the 2003 and 2004 survey, the species-wise breakdown not being published.

[5][6] Among the smallest of swallowtails in India, the green dragontail is usually found singly along open sunlit patches, almost always near streams and water courses.