Definatlely Amazon Tree Boas. Some will change as they get older, some do not. The red should stay red, the Garden phase may become a darker almost purple color, or brown, and the brown make darken but not much, just depends how old. Great snakes, look good as display, but can be quit aggressive and like to bite. I used to breed them and had about 10 at one time in 15 years I had one that never bit me or even tried, Have had others that wait for me to open cages and then go nuts on my hands and arms.