Adult females have four distinguishable phases named after geographic regions, with notable variations occurring in each. There is most likely an overlap of phases, and remember they are just phases not sub-species. The Malaysian phase has probably the most recognized, in part due to photos taken at the Snake Temple. The Kalimantan phase is probably the most desired of the phases due to its potential amount of blue coloring, but the colors can range in to almost solid shades of green with a cream belly. So called because of the unusually disproportionate relation in size to all other phases.
Adults retain their juvenile pattern and coloration, and retain a smaller size.
As juveniles, all phases start as a green bodied snake, cream to green ventral scales, with varying degrees of brick with white colored twin spots running the length of the back and a brick colored line through the eye. As adults, all phases are typically green bodied with varying degrees of brick with white colored twin spots running the length of the back and a brick colored line through the eye. I have heard rumors of adult males obtaining typical adult female coloration at maturity, but have never seen this. One of the most interesting characteristics of T. wagleri can be described in two words, all caps. The size difference is almost unbelievable.