Very lovely snake, I would say that from what I can see, it looks to be a very nice columbian boa.
The terms Columbian, Guyanan, Peruvian, etc. refer to 'localities' or places that that boa is found; not really coined as a phase really, but close enough. From what I understand, the BCI are widely ranged and very common... but that doesn't mean that you can't get a one in a million snake! Good luck with that one!
Stephanie S.
PS- It is a lot easier to try and ascertain what locality a snake is with a nice shot from above showing pattern and the head shape IMO, but still we, or at least I, could not give you a definite answer from a picture.

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