Graphium is a genus of mostly tropical swallowtail butterflies commonly known as swordtails, kite swallowtails, or ladies. Native to Eurasia, Africa, and Oceania, the genus is represented by over 100 species. Their colouration is as variable as the habitats they frequent; from rainforest to savannah. Some possess tails which may be long and swordlike, while others lack any hindwing extensions. Graphium species are often sighted at mud puddles.

Graphium agamemnon, the tailed jay, is a predominantly green and black tropical butterfly that belongs to the swallowtail family. The butterfly is also called the green-spotted triangle, tailed green jay, or green triangle. It is a common, non-threatened species native to Nepal, India, Sri Lanka through Southeast Asia and Australia. Several geographic races are recognized. The species was first described by Carl Linnaeus in his 1758 10th edition of Systema Naturae.