This "Blue" tree snake is a Blue phase of a tree snake. its
known as the common tree snake or (dendrelaphis punctulata). they are not common at all in the Canadian pet trade but, its probably possible to get one. I don't know much about the species, but a lot of arboreal colubrids are rear fanged and have mild venom. they will probably need UV and a warm spot of 25-30 oC and a they are probably lizard feeders. they will need high humidity.
anyways im gonna look into it a little more
Jordan David M.
"I Don't Get Mad, I Get Even!"