so im new to boas. never had one but would like to know a little more about them. i really like the little gray ones. of course they are red tails...i know that much at least. but im unsure of the orgin of them. i see alot of columbian and all that but don't know which ones are the gray ones. what i want to know is what are the gray ones called? and does the gray fade when they get older?