Pope's Pit Viper (Trimeresurus popeiorum)

This is another pit viper I managed to photograph back in 2010 at Doi Inthanon, Chiang Mai. It has been ID'd as a female Pope's Pit Viper or Trimeresurus popeiorum. The most distinctive thing about this specimen is its red eyes, as most seem to have yellow eyes. I didn't fancy getting any closer to the front of this one. It didn't seem as though she wanted me there.

 

Species ID through a snake specialist, who Joe Hartman knows. Many thanks to you both (though I don't know the specialist's name, unfortunately).