Kofiau island (Morelia viridis)

Kofiau island chondros are from the island of Kofiau off the west coast of Papua New Guinea. They are also referred to as Canary chondros. They are considered a naturally tame locality of Green Tree python. They don't all retain their bright yellow as adults but even the off yellow, greenish ones are nice. Kofiau island chondros are also known for their daily color changes

All of the original Kofiau island green tree pythons were wild caught Indonesian imports. Since then several breeders have produced them in captivity.

Source:
http://www.johnberryreptiles.com/pythons_c.htm