Over the weekend I went back to the spot where I saw the female Wagler’s pit viper (Tropidolaemus wagleri) the previous weekend. I was pleased to see that it had only moved a couple of metres during that time and with my 400mm lens I managed to get a few more photographs of it. I decided to inspect some of the other trees and bushes in the area and despite there being quite a lot of people, cats and dogs around I found a second female viper! This one was resting on a branch about a metre off the ground and was a greenish colour, typical of a sub-adult female. Several times I saw feral cats walk past the snake which they either did not notice or know to avoid!
UPDATE: the top photos are of the same sub-adult female viper a week later during this time it did not appear to have moved at all!