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This was taken at Kanneliya rain forest in Galle, Sri Lanka over 2 years ago. I couldn't identify the species.
I think Nuwan is correct. It appears to be moulting which changes its typical appearance. See these links http://www.flickr.com/photos/scorius/460... ., http://www.worldwildlifeimages.com/repti... , http://www.flickr.com/photos/danchanym/4...