Location of samples used for morphometric analyses showing final groups used in the canonical variate analysis. For details of numbers of males and females see Table 2. The oval map in the centre shows the approximate distribution of the Trimeresurus albolabris complex in green. A albolabris group (circles) B septentrionalis group (triangles) C purpureomaculatus group (diamonds, except for T. mutabilis, which is indicated by a star to distinguish it from T. cantori from the same location) D insularis group (squares). Localities are numbered as follows: 1. Hong Kong, 2. Komodo Island, Indonesia, 3. central Thailand, 4. northeastern China, 5. southern Thailand, 6. Flores Island, Indonesia, 7. eastern Java, Indonesia, 8. southeastern Thailand, 9. Ayeyarwady Delta, Myanmar, 10. northern Thailand, 11. central Laos, 12. Dooars, northeastern India, 13. northern Vietnam, 14. southern China, 15. Krong Pa, Vietnam, 16. West Malaysia, 17. Shan State, Myanmar, 18. western Java, 19. northern Laos, 20. Timor Island, Indonesia, 21. Sumba Island, Indonesia, 24. southern Vietnam, 25. Mekong Delta, 26. southern Sumatra, Indonesia, 27. central Vietnam ,28. Hainan Island, China, 29. northern peninsular Thailand, 31. central Nicobar Islands, India (T. cantori), 32. Car Nicobar Island, India, 33. Andaman Islands, India, 35. Wetar Island, Indonesia, 36. Lang Biang plateau, Vietnam, 38. Northern Myanmar, 39. Sankamphaeng mountain range, Thailand, 40. Bolaven plateau, Laos, 43. central Myanmar, 44. Arakan Yoma mountain range, Myanmar, 46. Bali Island, Indonesia, 47. northeastern India and Bangladesh, 48. western Myanmar, 49. southern Myanmar, 52. Himachal Pradesh, India, 53. Western Nepal, 55. Chaing Mai, Thailand, 59. northeastern Thailand, 60. central Nicobar Islands (T. mutabilis). Symbols and colours are as used in subsequent figures. Note that location numbers are not consecutive as the full list includes locations at which Trimeresurus species are not present.