Atrophaneura hector, the Common Clubtail or Hector\'s Swallowtail, is a striking butterfly species found in tropical Asia, including India, Sri Lanka, and Southeast Asia. Its wingspan measures 70-90 mm. The upper wings are black with yellow or orange markings, while the lower wings display black with yellow or orange spots and a distinctive tail.

This butterfly inhabits forests, grasslands, and wetlands, typically near streams or rivers. Active during warm weather, they feed on nectar from flowers. Males engage in territorial battles, while females lay eggs on host plants, typically Aristolochia species.

The life cycle consists of four stages: egg, larva (caterpillar), pupa (chrysalis), and adult. Caterpillars feed on specific Aristolochia species.

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